Even a 1 mile per hour speed boost would make things pretty weird.
The giant teeth can reveal clues about pollutants in the Narwhal's diet.
Bacteria and fungi were hurled into Earth’s middle stratosphere, which resembles many of Mars’ harsh conditions.
A controversial theory suggests that life could pre-date Earth.
Exactly how lucky did we get?
You don’t need to spend a ton of money to travel to remote locations.
Frozen water could be hiding in dark shadowy pockets scattered across the moon.
A unique trick could let microbes zip from Earth to Mars, for example, and survive the trek.
A new estimate suggests the Milky Way is home to six billion Earth-like planets. So far, we’ve found just one potential candidate.
What we thought was lava might be mud instead.
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