They share a frozen postcard from Mars, what do we know about ice and snow on the red planet? | Video
Posted at 19:50 ET (00:50 GMT) Friday, December 23, 2022 playing 1:48 Posted at 11:26 ET (16:26 GMT) Friday, December 23, 2022 2:59 Posted at 16:18 ET (21:18 GMT) Thursday,…