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What killed the whales? Two found dead off the Florida Keys, and one towed to a marina

Two sperm whales died within seven days of each other in the Florida Keys, according to state and federal officials. One was a juvenile whale that died May 4 off Key Largo. The other, a large adult that died after beaching itself near Mud Key, about 15 miles northeast of Key West in the Gulf of Mexico, was found on Tuesday, according to state wildlife officials. The adult whale, a male, was towed to Robbie’s Marina on Stock Island, just east of Key West. Kelly Richmond, spokeswoman for the Florida Fish and Wildlife Conservation Commission, said the whale is 47 feet long. “We just started a nec...

The war in Ukraine is fueling a new space race -- here's how

The suspension of collaborative projects between Russian and Western space agencies will enhance their traditional rivalries. But the new space race is also being driven by other countries—as well as private companies.

Shortly after Russia was sanctioned for invading Ukraine in late February, Russia’s state-run space agency, Roscosmos, announced that it was officially suspending the U.S. from an upcoming Venus exploration mission. Weeks later, on March 17, the European Space Agency (ESA) announced the suspension of a joint mission to Mars with Roscosmos, and further said that it would not be taking part in upcoming Roscosmos missions to the moon.

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Yup, Earth is still there: GOES-18 goes online, sends 1st image of planet

“Hello, world!” A NASA tweet greeted the internet Wednesday with a beautiful image of the bluish gem-like Earth — the first image captured by the newest weather satellite orbiting the planet. GOES-18, short for Geostationary Operational Environmental Satellite, blasted off in March from Cape Canaveral Space Force Station on a United Launch Alliance Atlas V rocket thanks to a collaboration between the National Oceanic and Atmospheric Administration and NASA along with several other partners. GOES-18 is a weather monitoring satellite that should help meteorologists determine potential areas of d...

Templeton Prize-winning physicist pushes back against anti-intellectualism

Frank Wilczek, the Nobel-winning theoretical physicist whose research transformed humanity's understanding of the fundamental forces of nature, was announced Wednesday as the winner of the prestigious 2022 Templeton Prize.

The 70-year-old told AFP he saw the award as a testament to the inspiring power of science, at a time when scientists themselves are increasingly under fire by anti-intellectual elements in society.

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The 1997 chess game that thrust AI into the spotlight

With his hand pushed firmly into his cheek and his eyes fixed on the table, Garry Kasparov shot a final dark glance at the chessboard before storming out of the room: the king of chess had just been beaten by a computer.

May 11, 1997 was a watershed for the relationship between man and machine, when the artificial intelligence (AI) supercomputer Deep Blue finally achieved what developers had been promising for decades.

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Summer heatwave bleaches 91 percent of Great Barrier Reef: report

A prolonged summer heatwave in Australia left 91 percent of the Great Barrier Reef's coral damaged by bleaching, according to a new government monitoring report.

It was the first time on record the reef had suffered bleaching during a La Nina weather cycle, when cooler temperatures would normally be expected.

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Key global warming threshold may be crossed in next 5 years, study says

The world is on track to breach a key global warming threshold, according to a new report. There’s now a 50-50 chance that the world will warm by more than 1.5 degrees Celsius over the next five years. In 2015, chances were near zero. Moreover, between now and 2026, there’s a 93% likelihood that one of the next five years will be the warmest on record, knocking 2016 out of its current No. 1 spot, the World Meteorological Organization said in its report, released late Monday. Even though the 1.5 degree C increase wouldn’t last – this time – it could still cause irreversible changes, the scienti...

What your eyes reveal about your health

Scientists at the University of California, San Diego, have developed a smartphone app that can detect early signs of Alzheimer’s disease and other neurological conditions. The app uses the phone’s near-infrared camera to track changes in the size of a person’s pupils at a sub-millimetre level. These measurements can then be used to assess that person’s cognitive condition.

As technology evolves, the eyes will prove more and more useful as a means of diagnosing all kinds of diseases and conditions because, by being transparent, the eye requires far less invasive methods of examination than other body parts.

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How a volcanic bombardment in ancient Australia led to the world’s greatest climate catastrophe

Some 252 million years ago the world was going through a tumultuous period of rapid global warming.

To understand what caused it, scientists have looked to one particular event in which a volcanic eruption in what is now Siberia spewed huge volumes of greenhouse gas into the atmosphere.

However, there is evidence the climate was already changing before this.

Sea surface temperatures had increased by more than 6–8℃ in the hundreds of thousands of years leading up to the Siberian outpouring. Temperatures increased again after it, so much so that 85–95% of all living species eventually went extinct.

The eruption in Siberia obviously made a mark on the planet, but experts remained puzzled about what caused the initial warming before it.

Our research reveals Australia’s own ancient volcanoes played a big role. Prior to the event in Siberia, catastrophic eruptions in northern New South Wales spewed volcanic ash across the east coast.

These eruptions were so large they initiated the world’s biggest ever climate catastrophe — the evidence for which is now hidden deep in Australia’s thick piles of sediment.

Ancient volcanoes

Our study, published today in Nature, confirms eastern Australia was shaken by repeated “super eruptions” between 256 and 252 million years ago.

Super eruptions are different to the more passive Siberian event. These catastrophic explosions spewed massive amounts of ash and gasses high into the atmosphere.

Today we see evidence of this in light-colored layers of volcanic ash in sedimentary rock. These layers are found across huge areas of NSW and Queensland, all the way from Sydney to near Townsville.

Ash layers in coal measures

Thick pile of coal with multiple light colored ash layers that represent volcanic eruptions sourced from the New England region and now in the Sydney basin. Ian Metcalfe

Our study has identified the source of this ash in the New England region of NSW, where the eroded remnants of volcanoes are preserved.

Though erosion has removed much of the evidence, the now innocuous-looking rocks are our record of terrifying eruptions. The thickness and spread of the ash produced is consistent with some of the largest volcanic eruptions known.

Eroded volcanoe

Eroded remnants of the volcanoes in the New England region of NSW. Tim Chapman

How big were the super eruptions?

At least 150,000 km³ of material erupted from the northern NSW volcanoes over four million years. This makes them similar to the supervolcanoes of Yellowstone in the United States and Taupo in New Zealand.

To put it into perspective, the 79AD eruption of Mt Vesuvius, which obliterated the Italian city of Pompeii, produced just 3–4km³ of rock and ash. And the deadly Mt St Helens eruption in 1980 was about 1km³.

The Australian eruptions would have repeatedly covered the entire east coast in ash — metres thick in some places. And a massive outpouring of greenhouse gases would have triggered global climate change.

Environmental devastation

Ancient sedimentary rocks provide us with a timeline of the environmental damage caused by the eruptions. Ironically, the evidence is preserved in coal measures.

Today’s coal deposits in eastern Australia show ancient forests used to cover much of this land. After the super eruptions, however, these forests were abruptly terminated in a series of bushfires over some 500,000 years, 252.5–253 million years ago.

Typically the plant matter accumulated in swamps and was then buried under sediments. The burial process provided heat and pressure which enabled the conversion of the plant matter into coal.

Without the forests, there was no plant matter to accumulate. The ecosystem collapsed and most animals became extinct.

The subsequent eruptions in Siberia only exaggerated the devastation started by Australia’s supervolcanoes.

And this collapse of ecosystems was not limited to Australia, either. The catastrophic event affected all of the ancient continents. It had a substantial influence on the evolution of life — which eventually led to the rise of the dinosaurs.

Australia’s super eruptions were a key marker of change in the ancient world. As we look to achieving a more habitable climate in the future, who knew the clues to environmental catastrophe lay buried beneath our feet?

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Rural California hatches plan for engineered mosquitoes to battle stealthy predator

VISALIA, Calif. — Bryan Ruiz moved his family into a newly built home in this Central Valley farming center seven months ago and almost immediately found they were under assault. Mosquitoes bit and harassed them in broad daylight. He looked around, trying to find a water source where they were breeding, and noticed a freshly dug pipe, meant to drain water from the backyard to the front. He lifted its cap and inside found a small puddle in the drainage line, which didn’t have enough slope to fully empty. He grabbed a turkey baster and drew water, already knowing what he would find: the larvae o...

Staring at an image of yourself on Zoom has serious consequences for mental health – especially for women

In the past few years, people across the world have spent more time on video chat programs like Zoom and FaceTime than ever before. These applications mimic in-person encounters by allowing users to see the people they are communicating with. But unlike in-person communications, these programs often also show users a video of themselves. Instead of catching the occasional glimpse of themselves in a mirror, now people are looking at themselves for hours a day.

We are psychologists who study society’s focus on women’s appearance and the consequences of this constant scrutiny. We were immediately fascinated by the new dynamic created by the Zoom world. While critical for public safety during the pandemic, we believe that virtual classes, meetings and the like lead to a continuous focus on one’s own appearance – something research suggests is harmful to mental health, especially for women.

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Nanoparticles are the future of medicine

When you hear the word “nanomedicine,” it might call to mind scenarios like those in the 1966 movie “Fantastic Voyage.” The film portrays a medical team shrunken down to ride a microscopic robotic ship through a man’s body to clear a blood clot in his brain.

Nanomedicine has not reached that level of sophistication yet. Although scientists can generate nanomaterials smaller then several nanometers – the “nano” indicating one-billionth of a meter – today’s nanotechnology has not been able to generate functional electronic robotics tiny enough to inject safely into the bloodstream. But since the concept of nanotechnology was first introduced in the 1970s, it has made its mark in many everyday products, including electronics, fabrics, food, water and air treatment processes, cosmetics and drugs. Given these successes across different fields, many medical researchers were eager to use nanotechnology to diagnose and treat disease.

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Electric eels inspired the first battery two centuries ago and now point a way to future battery technologies

As the world’s need for large amounts of portable energy grows at an ever-increasing pace, many innovators have sought to replace current battery technology with something better.

Italian physicist Alessandro Volta tapped into fundamental electrochemical principles when he invented the first battery in 1800. Essentially, the physical joining of two different materials, usually metals, generates a chemical reaction that results in the flow of electrons from one material to the other. That stream of electrons represents portable energy that can be harnessed to generate power.

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