China’s Mars orbiter, Tianwen-1, took the first close-up pictures of Comet 3I/Atlas, which has been in the news for a couple of months now. So, do these pictures give scientists some information about ...

Today, Mars is known as the red planet, for its rust-colored desert landscape. Once upon a time, Mars was a very different place. It had complex waterways and, possibly, ancient aliens. Researchers ...