A new year begins on Mars as three space probes close in on the Red Planet

Astronomers have found evidence that it rains diamonds on Neptune and Uranus, that Mars' ancient water created opals, and that some exoplanets have clouds full of rubies and sapphires.

Three U.S. Mars Missions Arriving By Next Week, First Martian Helicopter

Three Spacecraft Are About To Arrive At Mars. Here’s Everything You Need To Know About Them