Gege Li, Author at 91av Science news and science articles from 91av Fri, 27 Sep 2024 09:47:09 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.1 242057827 Dramatic images show the dark side of cobalt mining boom /article/2443422-dramatic-images-show-the-dark-side-of-cobalt-mining-boom/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Wed, 14 Aug 2024 18:00:00 +0000 http://mg26335040.700 In the village of Tshabula, villagers search for cobalt and copper in the waste tailings dumped by the lorries of the Chinese company Commus, which extracts minerals from one of the town's largest open-cast mines.
In the village of Tshabula, villagers search for cobalt and copper
Pascal Maitre/Panos Pictures

These stark images tell a dark tale about the mining of cobalt, one of the most prized minerals of the modern technological age.

Taken near Kolwezi in the Democratic Republic of the Congo, a major cobalt reserve, photos draw attention to the huge appetite for this metal. This is driven by its high stability and energy density, which make it suited for use in everything from lithium-ion batteries for electric vehicles to superalloys. The demand has led to corporations setting up vast extraction operations in the region, displacing villages.

The main image shows villagers in Tshabula, about 10 kilometres from Kolwezi’s centre, searching for cobalt among the waste dumped on the embankments of one of the largest open-cast mines in the area. It is run by the state and the company COMMUS (a wider view of the mine can be seen in the below image). The complex is set for an expansion that will destroy much of the housing nearby.

An open-cast industrial mine owned by Chinese company Commus and the DRC state (which extracts cobalt and copper) which is going to expand destroying housing in the nearby town.

But not all the mines in the region are official. Some have taken this lucrative practice into their own hands, digging deep tunnels. There are government schemes to regulate this trade and improve working conditions, but the 150,000-odd “artisanal” miners around Kolwezi receive little pay for their efforts.

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Mangrove forests celebrated in stunning photographs /article/2442747-mangrove-forests-celebrated-in-stunning-photographs/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Wed, 07 Aug 2024 18:00:00 +0000 http://mg26335030.200 These elegant and serene photos pay homage to a vital yet diminishing ecosystem: mangrove forests. The shots are some of the top entries in this year’s , telling the story of the beauty, diversity and fragility of mangrove trees, which grow in salty, coastal waters – in stark contrast to most other trees. Shown above is a dramatic photograph of a central strip of mangroves flanking the brilliant blue coast of the United Arab Emirates. Taken by photographer Ammar Alsayed Ahmed, the image was highly commended in the competition’s Mangroves & Landscapes category. Nature's Ribbon ? Winner ? Ammar Alsayed Ahmed, United Arab Emirates The top spot in this category was won by another of Alsayed Ahmed’s shots, which shows a gracefully winding river (shown above). The golden clumps of mangrove trees dotted along its length highlight the verdancy these forests bring to the area. Unfortunately, this isn’t the case for an increasing number of mangrove forests worldwide. Despite being biodiversity hotspots and significant carbon stores that help offset climate change, mangroves are under threat from factors like logging, aquaculture and water pollution, in turn threatening the wildlife and people that depend on them. Friends at the Edge - Highly Commended - Jillian Morris, Bahamas These include species like lemon sharks, a juvenile pair of which feature in Jillian Morris’s entry (pictured above), taken in the Bahamas and highly commended in the Mangroves & Underwater category. Lemon sharks spend the first few years of their lives in mangrove “nurseries” and are one of the many marine species that dwell there. In Abu Dhabi in the United Arab Emirates, an ambitious project to plant and restore coastal mangroves is underway. Theis part of a nationwide effort to plant 100 million mangrove trees by 2030 across the UAE. In 2023 alone, it distributed over six million seeds using specially adapted drones.]]> 2442747 Take a look behind the scenes at the world’s largest fusion experiment /article/2439489-take-a-look-behind-the-scenes-at-the-worlds-largest-fusion-experiment/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Wed, 17 Jul 2024 18:00:00 +0000 http://mg26335000.300
The 30-metre-deep assembly pit for the tokamak
©enrico sacchetti

Extreme in scale and ambition, this is ITER, the €20-billion energy project being built in southern France. It is set to pave the way to fusion power, akin to that which fuels the sun.

Work started on the world’s biggest fusion experiment in 2006 through an international effort, including the European Union, the US, China and Russia. The first run of the reactor, during which it will create superhot matter known as plasma – a state necessary for nuclear fusion to occur – was scheduled for 2020. This was first pushed back to 2025, and fresh delays have now postponed it to 2035.

Meanwhile, exclusive photographs taken by offer a glimpse into ITER’s construction and potential.

One of the Toroidal coils
©enrico sacchetti

The main image shows the size involved, with a 30-metre-deep assembly pit for the tokamak, a device responsible for confining spiralling plasma to a doughnut-shaped torus using magnetic fields. Pictured above is a shot of one of the toroidal coils that produce these fields.

The below images show some of the nine sectors that make up the ITER vacuum vessel. This weighs 5200 tonnes and provides a highly resilient “cage” for experiments, ensuring that continuously spiralling plasma doesn’t touch its walls.

The vacuum vessel being transported for repairs
©enrico sacchetti

The image above shows part of the vacuum vessel being transported for repairs, while the below shots show supports lining the wall of blanket modules that shield the structure and magnets from the heat and high-energy neutrons of the reactions.

Above and below shots show supports lining the wall of blanket modules that shield the structure and magnets supports lining the wall of blanket modules
©enrico sacchetti

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These stunning images made the shortlist for space photo competition /article/2438720-these-stunning-images-made-the-shortlist-for-space-photo-competition/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Wed, 10 Jul 2024 18:00:00 +0000 http://mg26334990.500 Arctic Dragon ? Carina Letelier Baeza (Chile) This impressive aurora, which seemingly takes the form of a dragon, was the result of a geomagnetic storm (level G2) generated by a coronal mass ejection. The photo was captured at the Arctic Henge, which was one of the only places in Iceland with clear skies that night. Taken with a Nikon D810A camera, 14 mm f/1.8, ISO 6,400, 2.5-second exposure Location: Raufarh?fn, Iceland, 25 February 2023

Astronomy Photographer of the Year, the , is back for its 16th run.

More than 3500 images were submitted for the award. Among the 30 to make the shortlist is Carina Letelier Baeza’s shot Arctic Dragon. Taken at the Arctic Henge in Iceland, it shows an aurora, the result of a geomagnetic storm generated by a coronal mass ejection, which looks like a rearing dragon.

Also on the shortlistis The Scream of a Dying Star (below), taken by Yann Sainty. The “star” in question is actually what remains of a supernova – when a star dies and explodes in a tremendous display of light and energy. This one occurred around 10,000 years ago.

The Scream of a Dying Star ? Yann Sainty (France) The Cygnus supernova afterglow is a popular object with astrophotographers, but the idea here was to take advantage of the high quality of the sky and the long exposure time to highlight details that are rarely seen, such as the outer envelope of the supernova remnant. The image?s name is a nod to The Scream, the famous painting by Edvard Munch, symbolising the scream that continues to echo through space after the star?s death. Taken with a Takahashi FSQ106EDX4 telescope, Sky-Watcher EQ6-R Pro mount, ZWO 2600MM camera, 382 mm f/3.6, 48 hours total exposure with 60 and 300-second subframes Location: Ouka?meden, Atlas Mountains, Morocco, 1?3, 5 and 24?26 July 2023

Sainty exposed rarely seen details of this glowing remnant, called the Cygnus Loop, by capitalising on a clear sky in the Atlas mountains in Morocco, combined with a long exposure time. The image’s name is a nod to the famous painting The Scream by Edvard Munch, though it also symbolises the “scream” that echoes through space after a star dies, according to Sainty.

Below is a dazzling shot of the sun above the Himalayas, captured by Geshuang Chen near the Tibetan city of Shigatse. It shows a meteorological phenomenon called a corona, produced by the thin, blanketing clouds, which are diffracting sunlight as it passes through, resulting in this vibrant array of iridescent colours. Chen has called the image The Palette of the Himalayas.

The Palette of the Himalayas ? Geshuang Chen (China) During the Spring Festival, the Sun and altostratus clouds acted together to create this huge corona, soaring above the Himalayas. The result is an enormous colour palette above the snowy peaks. Drone footage, DJI Mavic 3 Camera, 12.3 mm f/5, ISO 100, 1/3200-second exposure Location: Shigatse City, Xizang Province, China, 24 January 2023

The winners of the competition, which is run by the Royal Observatory in London, will be announced on 12 September. The winning images will be displayed in an exhibition at the National Maritime Museum in London from 14 September, alongside a selection of shortlisted images.

Article amended on 16 July 2024

We have corrected the type of corona that is visible in Geshuang Chen’s photograph

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See the solitary structures that once helped aircraft stay on course /article/2436948-see-the-solitary-structures-that-once-helped-aircraft-stay-on-course/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Wed, 26 Jun 2024 17:00:00 +0000 /?post_type=article&p=2436948
VOR NVS is on the edge of the village of Navas del Rey, Spain
Ignacio Evangelista

These solitary structures were once a key pillar of aviation navigation, but, due to their remote locations, today they are little known. Photographer starkly beautiful shots shine a light on the beacons, dubbed VORs (very high-frequency omnidirectional range stations), and their role in carving out routes in the sky for aircraft.

VOR CMA
Ignacio Evangelista

Essentially giant antennas, VORs beam out radio signals from secluded spots to allow planes to fix their location and stay on course by flying from VOR to VOR. The signals can be thought of as “breadcrumbs”, says Evangelista. The isolation is necessary to avoid interference in broadcasts between VORs.

Stations like the ones pictured here are a dying breed, as they are increasingly being decommissioned in favour of satellite-based GPS. But although GPS may be a more accurate means of navigation, VORs offer a back-up during events like solar storms or GPS interference, without which there could be a great deal of chaos, says Evangelista.

VOR BRY
Ignacio Evangelista

Because their locations are publicly available, anyone can seek out a remaining VOR simply by using GPS – a “curious technological pirouette”, as Evangelista puts it. This set him on course to document some of the more photo-worthy stations before they disappear for good.

Pictured from the top, the first two stations are in Spain – VOR NVS is on the edge of the village of Navas del Rey, 50 kilometres from Madrid, while VOR CMA is 1.5 km from the village of Calamocha. The last, VOR BRY, is on the edge of French village Bray-sur-Seine.

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Photos of a rusting Alaskan river win 91av Editors Award /article/2435743-photos-of-a-rusting-alaskan-river-win-new-scientist-editors-award/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Wed, 19 Jun 2024 18:00:00 +0000 http://mg26234960.400 Looking at this braided orange river bordered by lush green, you could mistake the scene for just another snapshot of a stunning river valley. But a closer inspection reveals that all is not as it seems. Photographer Taylor Roades travelled to the remote western Brooks Range in north-west Alaska last year to draw attention to how global warming is turning these waters not just rust-coloured, but into rust itself. The colour is down to oxidised iron, which, along with sulphuric acid, is formed as sediments once trapped in the frozen permafrost are released as the ice melts. The chemicals enter nearby tributaries, creating a concoction that is toxic for ecosystems and wildlife. This photo and the one below show how “the most remote places and ecosystems are being detrimentally affected” by human activity, says Roades. The region, which is hundreds of kilometres from any settlement, has warmed by 2.4°C on average since 2006. Taylor Roades: Rust River Earth Photo 2024 Shortlisted Entry 2023 was the hottest year on global record and the Arctic is disproportionately affected by these elevated temperatures. The remote Western Brooks Range of North West Alaska has recorded a 2.4 degree increase in temperature since 2006. Permafrost, the layer of soil that remains frozen throughout the year is thawing at an unprecedented rate, exposing the bedrock and all metals that have been frozen within it, to the elements. Tukpahlearick Creek and its tributaries are now flowing bright orange with oxidized iron and sulphuric acid. The change to water quality, and risks associated with metals in the water pose dire threats to ecosystems downstream that rely on these waters, and are symbolic of the far reaching consequences of climate change. Roades’s shots, titled Rust River, have won the 91av Editors Award – one of nine categories in this year’s , which showcases photos and videos that tell compelling stories about our planet. The winning entries will be on show at the Royal Geographical Society in London until 21 August.]]> 2435743 Spellbinding shots capture the Milky Way in all its glory /article/2435048-spellbinding-shots-capture-the-milky-way-in-all-its-glory/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Wed, 12 Jun 2024 18:00:00 +0000 http://mg26234952.200 2024 MILKY WAY PHOTOGRAPHER OF THE YEAR. ?LIGHTNING LAKE? ? TOM RAE

In the right place at the right time, cast your eyes to the sky and you may see something awe-inspiring.

This is the feeling evoked by these images, a few of the winners of this year’s competition. Each year, the top 25 spellbinding shots of our galaxy, captured from prime spots around the world, are curated and published by Dan Zafra, editor of travel photography blog Capture the Atlas.

Tom Rae’s entry (main image), shows the Milky Way emerging from New Zealand’s highest mountain, Aoraki/Mount Cook, on a winter’s night. “In rare alpine weather conditions, I embarked on a journey up the glacial valley one night,” said Rae in an announcement on Zafra’s site. “Upon reaching the lake, the scene that unfolded made me feel like I had landed on another planet.”

?ROAD TO WINTER PARADISE? ? ANDREA CURZI

In another elevated endeavour, Andrea Curzi captured an “arch” of the Milky Way (pictured above) over Passo Giau, a mountain pass in Italy. The red blurs in the sky are clouds of glowing hydrogen called emission nebulae, which appear red due to emitting only at particular wavelengths. The light is produced due to the ionisation of atoms in the gas, caused by newly forming stars.

?LUPINE DREAMS? ? BRANDT RYDER
Milky Way photographed in the Eastern Sierra region of California
2024 MILKY WAY PHOTOGRAPHER OF THE YEAR/BRANDT RYDER

2024 MILKY WAY PHOTOGRAPHER OF THE YEAR ?STARRY HOODOO WONDERLAND? ? STEPHANIE THI
Starry Hoodoo Wonderland
2024 MILKY WAY PHOTOGRAPHER OF THE YEAR/STEPHANIE THI

Meanwhile, the images above show remarkable scenes from the US. Brandt Ryder’s shot, first of the two, was taken in the Eastern Sierra region of California, where the Milky Way frames a violet sea of lupines. Stephanie Thi named her image, taken in Utah, Starry Hoodoo Wonderland – a nod to the toadstool-like hoodoo rocks that add to the aura of her starry backdrop.

Article amended on 13 June 2024

The second photo is of Passo Giau in Italy and was taken by Andrea Curzi.

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Striking image lets you see inside a deep-sea anglerfish’s killer jaws /article/2433871-striking-image-lets-you-see-inside-a-deep-sea-anglerfishs-killer-jaws/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Wed, 05 Jun 2024 18:00:00 +0000 http://mg26234940.500 Johnson's abyssal seadevil (Melanocetus johnsonii) portrait, cleared and stained by scientists, showing cartilage in blue and bones in red. Clearly visible in this picture are the pharyngeal jaws, which are like small forks that work like a second set of jaws that can pull prey items further into its mouth. The gill arches and gill rakers are also on full display. RV Sonne, Cruise SO285, South Atlantic, Benguela upwelling region off the coast of South Africa and Namibia. Captive..

With its gaping jaws and pointy teeth, this humpback anglerfish (Melanocetus johnsonii) seems even more terrifying when its inner intricacies are revealed. The deep-sea monster, also known as Johnson’s abyssal seadevil, was photographed by .

The image shows the fish after a long process of cleaning and staining to reveal its internal structures. Scientists used a digestive enzyme to remove the soft tissue, exposing bones and collagen, which were then stained. Blue shows cartilage, while the red is bone. Sometimes not all tissues become transparent during the chemical processes: for example, the dark mass (left) is the fish’s stomach.

This technique offers a rare glimpse inside the anglerfish, from its gills to its two sets of impressively scary jaws – just one of the remarkable adaptations that have evolved in deep-sea species, says Zankl. But don’t worry: females, like the one shown here, grow to about 153 millimetres long, while males are a mere 28 millimetres.

The fish live at a depth of about 900 metres in tropical oceans. This specimen was collected from the Benguela Upwelling System, very fertile deep waters in the South Atlantic Ocean, off the coast of South Africa and Namibia, during a research expedition to document the region’s wildlife.

Since deep-sea photography is a big challenge, Zankl says that working with scientists lets him visit otherwise inaccessible places. Documenting such creatures sheds light on their biology and on the broader ecological processes in fragile ecosystems, he says.

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An amazing great bustard gets ready for a new nature exhibition /article/2432974-an-amazing-great-bustard-gets-ready-for-a-new-nature-exhibition/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Fri, 24 May 2024 10:05:58 +0000 /?post_type=article&p=2432974 2432974 These stunning close-up photos offer a window onto the world of bees /article/2428811-these-stunning-close-up-photos-offer-a-window-onto-the-world-of-bees/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Wed, 01 May 2024 17:00:00 +0000 /?post_type=article&p=2428811
Title: Bees from World Museum's Entomology collection - Orchid bee Euglossa sp. (Male) North/South America Caption: Orchid bee Euglossa sp. (Male) North/South America - Bee specimen from World Museum's Entomology collection Credit: ? Pete Carr Photography
A bee from the genusEuglossa, also known as orchid bees
Pete Carr Photography

FEW insects (or even animals) hold quite as much sway on the planet as bees. As pollinators that flock from flower to flower, crop to crop, they keep the world’s flora and biodiversity thriving. And yet, thanks to a myriad of deadly factors, such as pesticides, habitat destruction and climate change, thousands of species are teetering on the brink.

Title: Female Violet Carpenter bee Xylocopa violacea dark background_Pete-Carr Caption: Bees: A Story of Survival Credit: ? Pete Carr Photography/National Museums Liverpool
A violet carpenter bee (Xylocopa violacea)
Pete Carr/National Museums Liverpool

A new exhibition all about these vital creatures, , provides an immersive window on their world, from the intricate anatomy of a single bee to the structure of entire colonies. In collaboration with artist Wolfgang Buttress, it uses sound, sculpture and light, blending art and technology to show visitors the lives of bees around the world, illuminating just how devastating it would be to lose them.

Title: Female Nomioides smallest NML bee_Pete-Carr Caption: Bees: A Story of Survival Credit: ? Pete Carr Photography/National Museums Liverpool
A bee from the genusNomioides
Pete Carr/National Museums Liverpool

The main image is of a bee from the genus Euglossa, also known as orchid bees. These are a key orchid pollinator in North and South America (although they also flock to rotting fruit, fungi and even faeces). The males, one of which is shown here, use the odours from the chemicals they collect from pollination to court females – the more complex the odour, the greater the attraction.

Title: Bees from World Museum's Entomology collection - African Carpenter bee Xylocopa inconstans (Male) Sub-Saharan Africa Caption: African Carpenter bee Xylocopa inconstans (Male) sub-Saharan Africa - Bee specimens from World Museum's Entomology collection Credit: ? Pete Carr Photography
An African carpenter bee (Xylocopa inconstans)
Pete Carr Photography

The next images show (top to bottom): a violet carpenter bee (Xylocopa violacea), recognisable through its purple-sheened wings and body, and one of the largest bees in Europe; a bee from the genus Nomioides, which is one of the smallest types of bee; and an African carpenter bee (Xylocopa inconstans).

The exhibition will be at the World Museum in Liverpool, UK, until 5 May 2025.

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