Astronomers have found some pretty wild exoplanets. Some are balls of lava the temperature of hell, one is partially made of diamond, and another may rain molten iron. However, not all exoplanets are ...

Curiosity, a car-sized robotic rover featured in Destination: Mars, landed on the red planet in August 2012 ... Gale crater reveals how much Mars looks like Earth. The highest peak in the ...

Computer simulations suggest that there is an undiscovered Earth-like planet lurking in the distant ... [+] Kuiper Belt, well past the orbit of Neptune (artistic illustration). There may be an ...