Every year, Earth ... do have seasonal cycles — and they can look wildly different from the ones we experience on Earth, experts told Live Science. You may like Which planets have rings?

Because Mars and Earth share ... surface once had liquid water. And these instruments have spotted minerals on its surface that scientists can analyze to get an idea of what Mars may have been ...

Advertisement Article continues below this ad Because Mars and Earth share so many ... to get an idea of what Mars may have been like in the past. If ancient Mars had liquid water, it would ...