How rare minerals form when meteorites slam into Earth

How rare minerals form when meteorites slam into Earth

The discovery of a rare mineral (reidite) at the Woodleigh meteorite impact structure in Western Australia was published this week by Curtin University honours student Morgan Cox and colleagues. Reidite – and other minerals – are sometimes formed when meteorites crash into Earth. This takes a particular set of circumstances. Only six prior discoveries of reidite had ever been reported.

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Strange ‘singing’ heard coming from the Antarctic ice

Strange 'singing' heard coming from the Antarctic ice

Scientists have heard strange "singing" noises coming out of the ice shelf. The low-frequency noises – which sound a little like moaning when sped up – could help researchers track the ice shelves as they collapse. The singing tones come out of the surface of the massive Ross Ice Shelf when the winds blowing across the snow dunes cause it to vibrate. That means they produce the "tones" almost constantly, and now scientists have found they can listen to them.

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Free societies face emerging, existential threats from technology

Free societies face emerging, existential threats from technology

Silicon Valley is currently, and correctly, under fire for the failure of leading platforms such as Facebook, Google and Twitter to protect against the spread of disinformation, hate speech and efforts to disrupt our elections. I don’t know why these companies behaved as they did. But whatever the reason – naiveté, excessive focus on near-term profits, or simply a lack of proper attention on mind-numbingly complex problems – it’s clear they have to do a better job of making sure technology makes our world safer, freer and more stable rather than the opposite.

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Exoplanet Hunters Have a New Plan to Spot Hidden ‘Migrating’ Worlds

Exoplanet Hunters Have a New Plan to Spot Hidden 'Migrating' Worlds

There's a telescope that can see thick rings of dust in distant star systems. These rings are huge — wide enough in some cases to encircle most or all the planets in our solar system. And they're the birthplaces of exoplanets. Understanding how they work could teach us about how the planets in our own solar system formed.

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No Such Thing as Too Much Exercise, Study Finds

No Such Thing as Too Much Exercise, Study Finds

Too much of a good thing can be definitely bad for us. But a new study published Friday in JAMA Network Open suggests that exercise is a clear exception. It found that any level of cardiovascular fitness — including the kind you’d see from elite athletes — is linked to staying alive longer. That exercise is universally great for our health sounds like a no-brainer, sure. But in recent years, there’s actually been evidence that elite athletes and other heavy exercisers might paradoxically be at greater risk of some…

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