Earth is so far the only known planet on which life exists—with liquid water and a stable atmosphere. However, the conditions were not conducive to life when it formed. The gas-dust cloud from which ...

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The curious minds at What If analyze the effects of Earth colliding with Mars, revealing climate devastation, mass extinction, and orbital chaos.

Yes, absolutely! When asteroids or comets hit rocky bodies such as the moon or Mars, they form impact craters that displace a large volume of material from the surface. Some of this material can be ...

Earth orbit is becoming increasingly crowded. With more than 11,000 active satellites and many thousands more expected in the coming years, as well as more than 1.2 million pieces of space debris ...