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Overflowing crater lakes carved canyons across Mars

Today, most of the water on Mars is locked away in frozen ice caps. But billions of years ago it flowed freely across the surface, forming rushing rivers that emptied into craters, forming lakes and seas. New research led by The University of Texas at Austin has found evidence that ...

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Kilogram Redefined. The Metric System Overhaul Is Complete

On the morning of Friday, November 16, scientists and diplomats crammed into an auditorium in Versailles, a stone’s throw from the Sun King’s gilded chateau. Patrick Abbott, an American physicist, had flown into France for the long weekend. Forehead gleaming and blue suit jacket draped across his lap, Abbott watched ...

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First-ever views of elusive energy explosion

Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving “magnetic reconnection” — the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion — in the Earth’s magnetotail, the magnetic environment that trails behind the planet. Magnetic reconnection has ...

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Fish recognize their prey by electric colors

The African elephantnose fish generates weak electrical pulses to navigate its environment. This localization sense apparently shows an astonishing similarity to vision, as a study by the University of Bonn now shows. The study demonstrates that different objects have different electrical “colors.” Fish use these colors for instance to distinguish ...

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See How the Buoyancy Force Works in Water or Air

What’s so great about getting in a swimming pool? The answer is that it can make you feel like a superhero. Even in the shallow end, you can easily lift another person—even someone larger than you. You become the hero of the pool area (until you get out of the ...

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