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Tuesday, Mar 19th

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Newly discovered cosmic megastructure challenges theories of the universe

Newly discovered cosmic megastructure

Astronomers have discovered a ring-shaped cosmic megastructure, the proportions of which challenge existing theories of the universe.

The so-called Big Ring has a diameter of about 1.3bn light years, making it among the largest structures ever observed. At more than 9bn light years from Earth, it is too faint to see directly, but its diameter on the night sky would be equivalent to 15 full moons.

The observations, presented on Thursday at the 243rd meeting of the American Astronomical Society in New Orleans, are significant because the size of the Big Ring appears to defy a fundamental assumption in cosmology called the cosmological principle. This states that above a certain spatial scale, the universe is homogeneous and looks identical in every direction.

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Scientists repeat nuclear fusion breakthrough 3 times

Nuclear fussion breakthroughFederal scientists have repeated their breakthrough toward nuclear fusion energy three times this year — and now say they can “consistently” produce fusion energy.

Late last year, the Energy Department announced its scientists had achieved a breakthrough — receiving a net-energy gain from a nuclear fusion reaction for the first time.

It later announced that it had repeated the achievement — getting a net energy gain for the second time in July.

A recent report from the Lawrence Livermore National Laboratory showed it got a net-gain two additional times — both in October.

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No Daddy Shark in sight: Zoo greets a cute shark pup after apparent parthenogenesis

by shark worn without a daddy

What if the song "Baby Shark" stopped after just two stanzas?

For non-fans of the catchy tune, that might sound like a dream. For a real-life Mommy Shark in Illinois, it's reality: She produced a baby without a Daddy Shark.

The epaulette shark pup hatched this summer at Brookfield Zoo, just west of Chicago. Its mother has been at the zoo since 2019; in that time, she's never shared a tank with a male.

It's a rare case of parthenogenesis, a type of asexual reproduction, according to the zoo.

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Joro spiders, huge and invasive, spreading around eastern US, study finds

Joro spiders here to stay

The latest species of spider found in the U.S. are huge, brightly colored and travel in a method described as "ballooning." And, according to new research, they're spreading out to new states around the country.

Researchers at Clemson University published a study on Joro spiders, coming to the conclusion that the species is spreading rapidly beyond the South Carolina area, and data shows they could inhabit most of the eastern U.S.

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Scientists reconstruct Pink Floyd song by listening to people’s brainwaves

Brain waves allow scientists to construct Pink FLoyd song

Scientists have reconstructed Pink Floyd’s Another Brick in the Wall by eavesdropping on people’s brainwaves – the first time a recognisable song has been decoded from recordings of electrical brain activity.

The hope is that doing so could ultimately help to restore the musicality of natural speech in patients who struggle to communicate because of disabling neurological conditions such as stroke or amyotrophic lateral sclerosis – the neurodegenerative disease that Stephen Hawking was diagnosed with.

Although members of the same laboratory had previously managed to decipher speech – and even silently imagined words – from brain recordings, “in general, all of these reconstruction attempts have had a robotic quality”, said Prof Robert Knight, a neurologist at the University of California in Berkeley, US, who conducted the study with the postdoctoral fellow Ludovic Bellier.

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The Perseid meteor shower peaks this weekend. Here's how to watch

Perseid meteor

Get ready for some shooting stars — this weekend is the peak of the annual Perseid meteor shower, the beloved astronomical event that sends bright streaks of light streaming across the night sky.

This year's show should be a good one, "mainly because the moon isn't going to interfere," says Michelle Nichols, director of public observing with the Adler Planetarium in Chicago. "We can have different reasons why a meteor shower may be better one year versus the next, and a lot of times it's the phase of the moon."

Because the waning crescent moon will be just a little sliver that rises late, the sky will be dark, creating the ideal backdrop for the meteor shower's celestial fireworks.

Plus, the fact that the peak arrives on the weekend means that many folks can stay up late or get up before dawn without the usual worries about having to go to work after losing sleep.

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The UFO reports piquing Nasa's interest

UFO photoIt was just a normal day's flying for Alex Dietrich – until it wasn't. Streaking through the sky over the tranquil expanse of the Pacific Ocean near San Diego, the US Navy lieutenant commander was taking her F/A-18F Super Hornet fighter jet on a training mission with a colleague in another plane. Then came a voice through the crackle of the radio.

It was an operations officer aboard the warship USS Princeton, asking them to investigate a suspicious object flitting around: on several occasions, it had been spotted 80,000ft (24.2km) high, before suddenly dropping close to the sea and apparently vanishing.

When the two jets arrived at its last known location, close to the ocean's surface, the water seemed almost to be boiling. Moments later Dietrich saw it: what seemed to be a whitish, oblong object around 40ft (12m) long, hovering just above the water – like a wingless capsule, which she described as resembling a Tic Tac. As they edged in closer, it was gone, accelerating off into the sky at what seemed an impossible speed, leaving a glassy expanse of regular sea behind.

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