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Stars that gobble up planets could narrow the search for other Earths
Enjoy breathing oxygen? Thank the moon.
What if the speed of Earth’s rotation suddenly got faster?
Narwhal tusks are full of illuminating secrets
Some of Earth’s tiniest living things could survive on Mars
Your ancestors might have been Martians
It’s a cosmic miracle that life on Earth’s lasted this long
Use Google Earth and Street View to explore the planet from your couch
New 3D moon models show it might hold up to 15,000 miles of frozen water
Clumps of bacteria could spread life between planets