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A rare gas is leaking from Earth’s core. Could it be a clue to the planet’s creation?
Escaping helium suggests our world may have formed quickly in a young solar system.
Astronomers just mapped the ‘bubble’ that envelopes our planet
It's really shaped more like a chimney.
A total solar eclipse bathed Antarctica in darkness
Lucky observers in Antarctica—and on the International Space Station—caught the show.
Stars that gobble up planets could narrow the search for other Earths
About a quarter of sun-like stars have likely snacked on a rocky planet.
Enjoy breathing oxygen? Thank the moon.
The air we breathe may be the result of a chance collaboration between microbes and the moon.
What if the speed of Earth’s rotation suddenly got faster?
Even a 1 mile per hour speed boost would make things pretty weird.
Narwhal tusks are full of illuminating secrets
The giant teeth can reveal clues about pollutants in the Narwhal's diet.
Some of Earth’s tiniest living things could survive on Mars
Bacteria and fungi were hurled into Earth’s middle stratosphere, which resembles many of Mars’ harsh conditions.
Your ancestors might have been Martians
A controversial theory suggests that life could pre-date Earth.
It’s a cosmic miracle that life on Earth’s lasted this long
Exactly how lucky did we get?