As Earth approaches warmer levels experienced earlier in its geologic history, it may be bad news for human survival.

On Sunday (Sept. 29), Earth captured a "second moon" that will accompany our planet on its journey around the sun for the next two months. The clingy space rock is actually a near-Earth asteroid ...

Human beings have been striving for years to learn more about the planets neighboring Earth. In particular, the efforts have focused on Mars, where the Curiosity rover has been pla ...

Forget roses and chocolates-instead, feast your eyes on a celestial show and take in the beauty of the cosmos. This […] ...

All month, four planets — Venus, Saturn, Jupiter and Mars — will appear to line up and be bright enough to see with the naked eye ... planet and the sun are directly opposite each other with ...