SAUDI ARABIA : 4,000-year-old town discovered hidden in Arabian oasis

Then an ancient 14.5 kilometer-long wall was discovered at the site

When Al-Natah was built, cities were flourishing in the Levant region along the Mediterranean Sea from present-day Syria to Jordan

The discovery of a 4,000-year-old fortified town hidden in an oasis in modern-day Saudi Arabia reveals how life at the time was slowly changing from a nomadic to an urban existence, archaeologists said on Wednesday.


The remains of the town, dubbed Al-Natah, were long concealed by the walled oasis of Khaybar, a green and fertile speck surrounded by desert in the northwest of the Arabian Peninsula.


Then an ancient 14.5 kilometer-long wall was discovered at the site, according to research led by French archaeologist Guillaume Charloux published earlier this year.


For a new study published in the journal PLOS One, a French-Saudi team of researchers have provided “proof that these ramparts are organized around a habitat,” Charloux told AFP.


The large town, which was home to up to 500 residents, was built around 2,400 BC during the early Bronze Age, the researchers said.


It was abandoned around a thousand years later. “No one knows why,” Charloux said.


When Al-Natah was built, cities were flourishing in the Levant region along the Mediterranean Sea from present-day Syria to Jordan.


Northwest Arabia at the time was thought to have been barren desert, crossed by pastoral nomads and dotted with burial sites.


That was until 15 years ago, when archaeologists discovered ramparts dating back to the Bronze Age in the oasis of Tayma, to Khaybar’s north.


This “first essential discovery” led scientists to look closer at these oases, Charloux said.


Black volcanic rocks called basalt concealed the walls of Al-Natah so well that it “protected the site from illegal excavations,” Charloux said.


But observing the site from above revealed potential paths and the foundations of houses, suggesting where the archaeologists needed to dig. They discovered foundations “strong enough to easily support at least one- or two-story” homes, Charloux said, emphasising that there was much more work to be done to understand the site. But their preliminary findings paint a picture of a 2.6-hectare town with around 50 houses perched on a hill, equipped with a wall of its own.


Tombs inside a necropolis there contained metal weapons like axes and daggers as well as stones such as agate, indicating a relatively advanced society for so long ago.
Pieces of pottery “suggest a relatively egalitarian society,” the study said. They are “very pretty but very simple ceramics,” added Charloux.


The size of the ramparts — which could reach around five meters (16 feet) high — suggests that Al-Natah was the seat of some kind of powerful local authority.
These discoveries reveal a process of “slow urbanism” during the transition between nomadic and more settled village life, the study said.


For example, fortified oases could have been in contact with each other in an area still largely populated by pastoral nomadic groups. Such exchanges could have even laid the foundations for the “incense route” which saw spices, frankincense and myrrh traded from southern Arabia to the Mediterranean.


Al-Natah was still small compared to cities in Mesopotamia or Egypt during the period.


But in these vast expanses of desert, it appears there was “another path toward urbanization” than such city-states, one “more modest, much slower, and quite specific to the northwest of Arabia,” Charloux said.

source/content: arabnews.com (headline edited)

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This picture taken on December 12, 2022 shows an aerial view of an old fort in the Khaybar oasis in northwestern Saudi Arabia. Khaybar, best known for a 7th-century fierce battle between the Islam’s Prophet Mohamed and local Jewish tribes is remodelling itself as an upscale tourist draw in line with the kingdom’s rebranding efforts. Situated in an oasis amid a volcanic field north of Medina, it was once home to thousands of Jews, who were defeated in a decisive seventh-century battle with the Prophet’s army as Islam expanded across the Arabian peninsula. (Photo by Mohammad QASIM / AFP)

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SAUDI ARABIA

SAUDI ARABIA : Jouf breaks 02 Guinness records for the ‘World’s Largest’ & the ‘World’s most modern, organic olive farms’

Jouf Gov. Prince Faisal bin Nawaf bin Abdulaziz has praised the country’s leaders and the Ministry of Environment, Water and Agriculture for supporting the region’s record-breaking developmental and economic initiatives.

Prince Faisal made the comments during a ceremony marking the region’s achievements, the Saudi Press Agency reported on Monday.

Two certificates were presented by Guinness World Records representative Kenzi Al-Dafrawi to Mazen Badawood, CEO of the Al-Jouf Agricultural Development Co.

The certificates honored the company for having the world’s largest and most modern organic olive farm, the SPA reported.

The event was attended by Abdulaziz Al-Rujai, director general of the ministry in the Jouf region. 

Prince Faisal said: “We take pride in the national accomplishments that the Kingdom’s Vision 2023 has realized in promoting self-sufficiency and achieving food security.”

Badawood thanked Prince Faisal for his dedication to serving the people of the region. 

He said Jouf’s agricultural, environmental and water purification projects provide a model for others to follow.

The awarding of the two certificates coincided with Organic Food Day, celebrated on Nov. 11, which the Kingdom marked with a series of events across the country. 

Organic Food Day is aimed at encouraging people to make healthy dietary choices and embodies efforts to achieve sustainable food security, in line with the objectives of the Kingdom’s Vision 2030 plan. 

The ministry aims to encourage farmers to adopt organic farming practices, educate consumers, as well as promote resource sustainability and local production.

As a part of the celebrations, Riyadh is hosting the Saudi International Exhibition for Organic Products from Nov. 11 to 13 to support the local community, and position the nation as a leading hub in this growing sector.

source/content: arabnews.com (headline edited)

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Two certificates were presented by Guinness World Records representative Kenzi Al-Dafrawi to Mazen Badawood, CEO of the Al-Jouf Agricultural Development Co.

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SAUDI ARABIA

TUNISIAN Nadia Selmi – Food Heroes archive of FAO

“I believe in the power of women. The seaweed farm is run by women, and women represent 80 to 90 percent of all staff in administration, the labs and research.”

For most people, the word ‘engineer’ doesn’t immediately bring up images of food, and even fewer will think of seaweed. And yet, that’s exactly the niche where Nadia Selmi is pioneering new uses for an oft-overlooked marine resource. 

Today, she is the commercial director of SELT Marine, a Tunisian seaweed company that employs more than 100 women in producing nutritious seaweed powder that can be made into vegetable gelatin for dairy, sweets and vegan products

“I believe in the power of women,” says Nadia. “The seaweed farm is run by women, and women represent 80 to 90 percent of all staff in our administration, the labs and research.”

Many of the women working on the seaweed farm come from vulnerable rural communities and have found a new kind of job in the growing sector. 

And the potential that the sector holds for food security and food system transformation is significant. Using just 0.03 percent of our oceans’ surface, seaweed could add up to 10 percent to the world’s food supply. Importantly, seaweed tends to be rich in vitamins and fibres and low in calories, making it a great addition to a healthy diet.

Beyond the food industry, seaweed powder is already used in many pharmaceutical and cosmetics products. And more recently, it is being transformed into biodegradable bottles and bags.

But that’s not the only way seaweed can contribute to a better environment.

Increasingly, scientists and policy makers are also seeing its potential as a “nature-based solution” to mitigate climate change and support ecosystem services. For example, if seaweed production keeps growing at the current rate, it could absorb 135 million tonnes of carbon dioxide per year by 2050, and 30 percent of all the nitrogen entering the oceans from land-based pollution.

Nadia, who started out as a researcher in the company’s lab, is now championing the uptake of Tunisian seaweed by building partnerships with businesses around the world and working with research institutions to get even more goodness out of the aquatic greens.

FAO supports innovators like Nadia through its General Fisheries Commission for the Mediterranean, which promotes seaweed aquaculture as a way to boost sustainable growth, marine conservation, and livelihoods in the Mediterranean and the Black Sea.

source/content: fao.org (headline edited)

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TUNISIA 

EGYPTIAN Researcher records new unknown genus of rodents dating back 34 million years

About 34 million years ago, in the Eocene period of the Paleogene (the period from 66 to 23 million years ago), and in a tropical-like environment with forests and swamps in what is today the Qatrani Desert in Egypt’s Fayoum Depression, a genus of rodents that was not known before, used to live. 

In a new study published in PeerJ, researcher Shorouk Al-Ashqar, a member of the “Sallam Lab” team specialised in vertebrate fossils at Mansoura University, studied two skulls and a large group of mandibles of fossils belong to the “Qatranimys Safroutus”.

“But it wasn’t easy; the samples were very small and very thin and adhered to the solid rocky clay, which made preparing the samples for study very difficult. We had to make accurate CT scans to be able to study them in a three-dimensional image,” said Hesham Sallam, the lead author of the study. 

The newly discovered genus of rodents was called “Qatranimys Safroutus” which refers to the location of the discovery in the first word, whilst “safroutus” means too small in the Egyptian Arabic dialect.

The length of the molar of Qatranimys Safroutus was one millimetre, and its skull was about 1.5 centimetres long, and its weight did not exceed 45 grams. 

Jebel Qatrani Formation is famous for its rich rodent assemblages from the Eocene–Oligocene deposits, which contributes to enhancing our understanding of the origin and paleobiogeography of what scientists call the “Hystricognathi” which are an infraorder of rodents, distinguished from other rodents by the bone structure of their skulls.

Al-Ashqar said that the samples used in the study showed clear differences in the morphological characteristics of the upper and lower teeth. And by comparing these samples with the discovered rodents from Afro-Arabia, it was clear that it belongs to a new genus that has never been discovered before.

“We did not only record a new genus and species, but we were able to record the first bones of the skull of a large group to which the discovery belongs, called the “Phiocricetomys”, she added. 

Researchers from Mansoura University, the American University in Cairo, the Egyptian Environmental Affairs Agency, Duke University and the University of Salford participated in the study.

source/content: dailynewsegypt.com (headline edited)

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EGYPT

ABU DHABI, U.A.E: Razan Al-Mubarak Chairs the 111th session of the International Union for Conservation of Nature (IUCN) meeting in Switzerland

The 111th session of the IUCN Council meeting began today in the city of Gland, Switzerland, chaired by Her Excellency Razan Al Mubarak, President of the International Union for Conservation of Nature.

The 3-day meeting discusses a group of issues, most notably “Vision.” The strategy for the Union” which extends for 20 years, and the Council is preparing it for review and comment by the members of the Union.

Al-Mubarak said in her speech during the meeting: “The strategic vision, which extends for twenty years, places at the heart of its attention the unprecedented challenges facing the climate and the survival of living species,” noting that in light of the increasing possibility of humanity exceeding the 1.5 degree Celsius target set by the Paris Agreement, Conservationists realize that their work will be more difficult and more important. She stressed the need to address these challenges by strengthening efforts and helping to support justice in the world so that we can all be more appreciative of nature and keen to preserve it.

During this session, the Council is scheduled to review and evaluate the initial draft of the Union’s program for the period 2026-2029, as a first step in the Union’s journey seeking to prepare the final version of the four-year plan, which will be voted on by the members, in preparation for its adoption during the International Union for Conservation of Nature’s World Conference in 2017. 2025, which is scheduled to be held in Abu Dhabi from October 9 to 15 next year, with the participation of representatives of public institutions, civil society, indigenous peoples, academia and the private sector.

source/content: wam.ae (headline edited)

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ABU DHABI, UNITED ARAB EMIRATES (U.A.E.)

OMAN: Unesco recognises Jibreen Castle and Omani Historian Humaid bin Mohammed bin Ruzaiq

The United Nations Educational, Scientific and Cultural Organization (Unesco) has recognised Oman’s rich cultural history by including two significant Omani cultural milestones in its list of anniversaries for 2024-2025. This recognition includes the 350th anniversary of the Jibreen Castle and the 150th death anniversary of renowned Omani historian and poet Humaid bin Mohammed bin Ruzaiq.


Since 1956, Unesco has been instrumental in commemorating historical events and eminent personalities of its member states, elevating their significance on a global platform. Such celebrations are pivotal in fostering international understanding, enhancing cultural exchanges and promoting peace.


An architectural gem of the 17th century, Jibreen Castle marks its 350th anniversary of construction under the reign of Imam Belarab bin Sultan al Yarubi. Completed in 1675, the castle is a testament to Oman’s architectural prowess, built by the era’s finest craftsmen and architects. Beyond its architectural magnificence, Jibreen Castle was a centre of knowledge and learning, and served as a residence for the imam and the seat of his governance.

It flourished as an educational hub, attracting scholars and educators in various fields such as jurisprudence, literature, history, astronomy, mathematics, medicine and chemistry. It produced over 40 distinguished scholars and writers under Imam Belarab bin Sultan’s patronage.


In addition to Jibreen Castle, Unesco commemorates the 150th anniversary of the passing of the 19th century Omani historian Ruzaiq. His contributions were monumental in documenting the historical phase from the rise of the Al Busaid dynasty to the end of Sayyid Said bin Sultan’s reign in 1856. His works, characterised by neutrality and meticulous research, provide invaluable insights into the European presence in the Indian Ocean and the Arab region. Ruzaiq’s writings are not only historical records but also serve as critical references for contemporary researchers in Omani history.


The inclusion of these two elements takes the total number of Omani contributions to Unesco’s celebration programme to eight. The sultanate has successfully highlighted six other Omani figures in the past, including linguist Al Khalil bin Ahmed al Farahidi in 2005, pharmacist Rashid bin Omairah al Hashimi al Rustaqi in 2013, polymath Sheikh Nour al Din Abdullah bin Humaid al Salmi and physicist Abu Muhammad Abdullah bin Muhammad al Azdi, known as Ibn al Dhahabi, in 2015, poet Nasser bin Salem al Rawahi, also known as Abu Muslim al Bahlani, in 2019, and the famed navigator Ahmed bin Majid al Saadi in 2021.

Unesco’s recognition of Omani cultural heritage underscores the sultanate’s significant contributions to the global cultural landscape, celebrating the rich tapestry of its history and the enduring legacies of its eminent personalities.

source/content: muscatdaily.com (headline edited)

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OMAN

SAUDI ARABIA: Saudi Pavilion at Doha Horticultural Expo 2023 Wins 5 Awards, sets World Records

Kingdom dazzles with record-breaking LED display and inspiring sustainability schemes.

The Saudi pavilion at the Doha Horticultural Expo 2023 won five awards, set world records and drew 1.8 million visitors to its expansive site spanning 5,000 sq. meters.

The pavilion’s lush green design drew inspiration from Mount Tuwaiq, the Saudi Press Agency reported on Saturday.

Saleh Bindakhil, the head director of the Saudi campaign, said that the pavilion provided a “groundbreaking digital experience” centered on agriculture and environmental sustainability.

It showcased more than 80 successful Saudi projects and initiatives in line with the exhibition’s objectives, he added.

The pavilion, which aimed to inspire the global community to combat desertification, secured five awards and set world records, Bindakhil said.

It broke the Guinness World Record for the largest display of exterior LED screens, with an impressive array of 435 external LED columns.

Additionally, the pavilion received a Gold Muse Award in the conceptual design and events category, and a Gold French Design Award in the interior design and architecture category.

It clinched the LIV Award in architectural and landscape design, along with a silver award from the Bureau International des Expositions in the self-built pavilions category.

The pavilion welcomed visitors from around the world, offering communications in seven languages: Arabic, English, French, Italian, Spanish, Japanese and Persian.

Its numerous sections showcased the diversity and richness of the Kingdom.

The pavilion also highlighted the pivotal role of agriculture and major sustainable projects in Saudi Arabia.

The Doha expo, which began in October last year and ended on March 28, aimed to promote environmental solutions to a global audience.

The event included four key pillars: Modern agriculture, technology and innovation, environmental awareness and sustainability.

source/content: arabnews.com (headline edited)

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The pavilion’s lush green design drew inspiration from Mount Tuwaiq, the Saudi Press Agency reported on Saturday. (SPA)

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SAUDI ARABIA

EGYPT : The record-breaking Freedivers of Egypt

Masters of relaxation: The record-breaking freedivers of Egypt.

When the countdown began, Khaled Elgammal took one final, deep breath before descending without any breathing equipment into the ocean. One minute and 29 seconds later, still holding his breath, the Egyptian athlete had free-fallen to 102 metres (335 feet) – a national record.

But for it to count, he had to reach the surface again. He turned at the bottom of the line and began his ascent – focusing on deep relaxation and the feelings of the surrounding water. In all, he had held his breath for two minutes and 50 seconds.

Elgammal is Egypt’s deepest freediver, and his remarkable achievement set a new national record at the Sharm el-Sheikh competition in October 2023.

“When I came to the surface, it was bliss. It felt amazing,” Elgammal recalls.

Freedivers like Elgammal rely solely on the ability to hold their breath while diving underwater. Through training, these divers master relaxation to slow down their heart rate, allowing them to stay beneath the surface without breathing equipment for minutes at a time. Very deep dives like the one he did recently usually require divers to hold their breath for around three minutes at a time.

The practice of freediving can be traced back to traditional fishing in communities like Asia’s Bajau people, where coastal groups have used freediving to hunt underwater for 200 years. As a sport, freediving is now undergoing record growth, attracting people looking to connect with the ocean and better understand their body’s abilities.

As for Elgammal, he says he was captivated by the unique sensations of diving with a single breath.

“I always say that scuba diving is everything in slow motion; you’re moving slow, breathing slow, and the sound of the bubbles is hypnotising, so everything is in slow motion. Freediving is like you’ve paused… and are the only thing moving down there. So you give yourself the chance to sink within.”

The sport is now growing in popularity around the world. According to AIDA International rankings, 2,889 freedivers registered to compete in competitions in 2023, more than twice the number a decade earlier.

The freediving organisation told Al Jazeera that around 20,000 people have become certified freedivers in recent years. Scuba Schools International (SSI) has similarly seen a steady 10 percent annual rise in the number of people earning their first freediving certification.

Many of these certifications are awarded in Dahab, a bohemian enclave on Egypt’s Red Sea coastline which has become home to numerous freediving schools and elite instructors. Dahab featured a shoreline of palm trees and traditional Bedouin homes just a few decades ago. While still considered a small town today, it boasts a thriving beachfront of Egyptian and international restaurants and attracts a growing crowd from Cairo, Europe and Asia. A handful of luxury hotels have emerged but Dahab still maintains an authentic charm – with herds of goats freely roaming the streets.

It’s also one of the world’s best-known freediving hotspots due to its year-round water conditions and proximity to Egypt’s Blue Hole. Just 20 minutes away by car, the Blue Hole is a famous reef-lined sinkhole accessible from the shore.

Here, divers can descend to around 90 metres (295 feet) – almost the height of the Statue of Liberty.

A heightened state of self-awareness

But what has contributed to the rise of freediving?

The sport is linked to several mental and therapeutic benefits. A 2013 study by academics at ​​Atilim University in Turkey, found that freedivers tend to exhibit lower stress and anxiety levels than non-freedivers.

Carlos Diezel, the manager of Dahab Freedivers, a school that trains divers, explained that much of this is down to “breathwork”.

“The fact that we have to pay attention to our breath, our mind and relaxation when we go down teaches us awareness,” he says. “I believe that part of the problem, statistically speaking, for mental health issues is related to the lifestyle in modern society, that’s leading people to forget or block any kind of self-awareness.”

This heightened state of self-awareness is something that dedicated freedivers like Elgammal strive for. “I’m always aware now of what I’m feeling, what I’m sensing,” he says. “Freediving helped me to connect with myself.”

Freediving’s connection with nature and immersion in water may also contribute to its mental health benefits. Diezel says the most common reasons people sign up for freediving courses are a fascination with the ocean and learning more about themselves.

“They grasp this connection with themselves when you hold your breath and go deep,” he said, adding that students consider it “a ‘deep’ experience – sorry for the pun”.

Social media equally plays a role in bringing freediving to the forefront. Many freediving pictures allude to a sense of freedom, featuring divers among marine life and colourful reefs. The hashtag #freediving has amassed more than 3.5 million mentions on Instagram so far. “It’s getting a lot of attention as it’s quite photographic. Some videos are just mesmerising,” Diezel adds.

Diving safely

Within the existing freediving community, the sport’s surge in popularity brings added responsibility. Considered an “extreme sport”, freediving can be risky if safety protocols aren’t followed, or divers push themselves beyond their physical limits. They can experience oxygen deficiency symptoms like hypoxia and blackouts, as well as pressure-related risks like a ruptured eardrum, an example of a barotrauma.

Contrary to portrayals such as Netflix’s The Deepest Breath, divers losing consciousness – known as blackouts – are relatively uncommon, particularly in recreational diving at shallower depths.

Freedivers are also trained to rescue a fellow diver safely as part of their earliest training, learning to monitor each dive, spot signs of distress and how to react. Under the buddy system, which helps to ensure freedivers remain safe, divers never dive alone.

Tamsyn Signe is a professional freediver who champions safety whenever she enters the water. She has worked as a safety freediver in multiple competitions, and it’s her role to ensure the competing divers make it to the surface safely. Last year, she saved a diver’s life 30 metres (98 feet) underwater in a rare example of a deep rescue.

“As he got in front of me, the lights went out,” Signe recalls, describing the moment the ascending freediver just stopped moving after losing consciousness. At 30 metres below the surface, Signe was also holding her breath. However, she wasn’t thinking about the carbon dioxide building in her body – she had a job to do.

“Everything really slowed down,” she says. “I knew I was his best shot at being ok.” As she’s trained to do, Signe closed his airways with her hands and started finning (swimming up with flippers) with him toward the surface – a tricky job with the added weight of another diver. The competitor regained consciousness after reaching the surface, partly thanks to Signe’s quick thinking and supportive team. He would later reach out and thank her for saving his life.

Signe says the rescue changed her life too, making her more observant and prepared for unexpected risks, but it’s part of the job. Most freedivers believe that practising safety in freediving, such as never diving alone and being trained for rescue, is crucial to the sport’s survival.

But this is not just a tick-box exercise; safety also forges close bonds within the community. “When you go through an experience with people where you could potentially die, there’s some sort of connection that happens that is way deeper and intimate than normal. And those friendships do last a lifetime,” Signe adds.

Responsibilities beyond the breath-hold

Alongside valuing safety, Zahraa El-Husseiny, a freediving instructor and Egyptian national record holder, believes that protecting our oceans is also an important responsibility which comes with freediving. Many freedivers collect plastic they find floating in the water; others, like Diezel, stopped eating seafood after learning about the human impact of overfishing.

As Earth’s oceans face increasing pressures from pollution and global warming, those who rely on the sea will play a vital role in future conservation. First drawn to freediving because she was fascinated with marine life, El-Husseiny tries to teach others about respecting the ocean through her sport.

“We are very connected to the ocean, and we owe it to this to protect it. We know how essential it is to move freely underwater, so… we need to protect it,” she says.

For many, freediving offers a path for self-discovery and a deeper connection to the natural world. As a sport, it’s poised for continued growth in the future.

Freediving isn’t reserved for a select few either, and freediving communities are expanding in many coastal locations. “Everyone can learn how to hold their breath,” El-Husseiny adds.

“Everyone can learn how to enjoy the ocean and the peacefulness of diving. I would like people to know that this is something they can do, learn and progress in”, she says.

Passing on the love of this sport is something many freedivers take seriously. When Elgammal isn’t training for record-breaking dives, he’s working as an instructor and coach. He similarly urges those interested in the sport to “be curious”.

“Relax, enjoy, trust. Think about what you like and try to visualise that feeling.”

source/content: aljazeera.com (headline edited)

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EGYPT

LIBYAN Desert’s Yellow Glass: how we discovered the origin of these rare and mysterious shards

The Great Sand Sea Desert stretches over an area of 72,000km² linking Egypt and Libya. If you find yourself in a particular part of the desert in south-east Libya and south-western parts of Egypt, you’ll spot pieces of yellow glass scattered across the sandy landscape.

It was first described in a scientific paper in 1933 and is known as Libyan desert glass . Mineral collectors value it for its beauty, its relative rarity – and its mystery. A pendant found in Egyptian pharaoh Tutankhamun’s tomb contains a piece of the glass . Natural glasses are found elsewhere in the world; examples include moldavites from the Ries crater in Europe and tektites from the Ivory Coast. But none are as rich in silica as Libyan desert glass, nor are they found in such large lumps and quantities.

The origin of the glass has been the subject of debate among scientists for almost a century. Some suggested it might be from volcanoes on the moon. Others propose it’s the product of lightning strikes (“fulgurites” – glass that forms from fusion of sand and soil where they are hit by lightning). Other theories suggest it’s the result of sedimentary or hydrothermal processes; caused by a massive explosion of a meteor in the air; or that it came from a nearby meteorite crater .

Now, thanks to advanced microscopy technology, we believe we have the answer. Along with colleagues from universities and science centres in Germany, Egypt and Morocco, I have identified Libyan desert glass as originating from the impact of a meteorite on the Earth’s surface.

Space collisions are a primary process in the solar system, as planets and their natural satellites accreted via the asteroids and planet embryos (also called planetesimals) colliding with each other. These impacts helped our planet to assemble, too.

Under the microscope

In 1996 scientists determined that the glass was close to 29 million years old. A later study suggested the source material was composed of quartz grains, coated with mixed clay minerals and iron and titanium oxides.

This latter finding raised more questions, since the proposed age is older than the matching source material in the relevant area of the Great Sand Sea desert. To put it simply: those source materials didn’t exist in that location 29 million years ago.

For our recent study, a co-author obtained two pieces of the glass from a local who had collected them in the Al Jaouf region in south-eastern Libya.

We studied the samples with a state-of-the-art transmission electron microscopy (TEM) technique, which allows us to see tiny particles of material – 20,000 times smaller than the thickness of a paper sheet. Using this super-high magnification technique, we found small minerals in this glass: different types of zirconium oxide (ZrO₂).

Minerals are composed of chemical elements, atoms of which form regular three-dimensional packaging. Imagine putting eggs or soda bottles on the shelf of a supermarket: layers on top of layers to ensure the most efficient storage. Similarly, atoms assemble into a crystal lattice that is unique for each mineral. Minerals that have the same chemical composition but different atomic structure (different ways of atom packaging into the crystal lattice) are called polymorphs.

One polymorph of ZrO₂ that we observed in Libyan desert glass is called cubic zirconia – the kind seen in some jewellery as a synthetic replacement for diamonds. This mineral can only form at a high temperature between 2,250°C and 2,700°C.

Another polymorph of ZrO₂ that we observed was a very rare one called ortho-II or OII. It forms at very high pressure – about 130,000 atmospheres, a unit of pressure.

Such pressure and temperature conditions provided us with the proof for the meteorite impact origin of the glass. That’s because such conditions can only be obtained in the Earth’s crust by a meteorite impact or the explosion of an atomic bomb.

More mysteries to solve

If our finding is correct (and we believe it is), the parental crater – where the meteorite hit the Earth’s surface – should be somewhere nearby. The nearest known meteorite craters, named GP and Oasis, are 2km and 18km in diameter respectively, and quite far away from where the glass we tested was found. They are too far and too small to be considered the parental craters for such massive amounts of impact glass, all concentrated in one spot.

So, while we’ve solved part of the mystery, more questions remain. Where is the parental crater? How big is it – and where is it? Could it have been eroded, deformed or covered by sand? More investigations will be required, likely in the form of remote sensing studies coupled with geophysics.

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source/content : theconversation.com (headline edited)

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The pieces of Libyan desert glass that formed the basis of the study. Author provided

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LIBYA

OMANI Students Create Device to produce Water from Air

A smart device designed and created by Omani students has gained attention for its ability to squeeze water out of air. The students claim purity of the water extracted from air has been scientifically proven to be safe for drinking.

The student team from the National University of Science and Technology, called Skydrop Company consists of Mona al Kharousi, Hiba al Shuaibiya, Qusay al Jadidi, Safaa Yahya al Naabi, Maad al Harasia, Moadh Saif al Rashdi, Al Mutamin Suban al Balushi and Naglaa bint Habib al Amriya.

Describing the rational behind the project, Mona said, “We wanted to create an easy-to-use product for athletes, adventurers and travellers, who sometimes face challenges related to the availability of drinking water.”

She added that the device works on user-friendly technology, is low cost and has sustainable environmental characteristics.

“It is made of environmentally friendly reinforced plastic and can be charged using electricity or solar energy.”

According to Mona, the device is small and lightweight and works to convert air into water in an innovative way, producing water from the surrounding moist air.

“Water vapour is condensed by cooling and then turned into dew to reach the last stage of the sedimentation process and conversion into pure drinking water.”

Mona explained that the device will contribute significantly to solving the problem of environmental pollution from plastic, which has become widespread because of bottled drinking water that are difficult to decompose, in addition to finding an innovative environmental solution to achieve water security.

About the challenges the students faced while giving shape to their project, Mona said, “The lack of capital is the toughest challenge for this project in addition to difficulty in sourcing certain parts for it.”

Skydrop Company is currently working to make a bigger version of the device to deploy in the agricultural sector, especially in the desert. “The team aspires to be a leader in creating modern technologies for the production of potable water that are suitable is different environmental conditions.”

source/content: muscatdaily.com (headline edited)

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OMAN