Just relaying what they said. Seems far fetched. They theorized the Martians came here after their planet became uninhabitable.
When they first came back with pix from Mars with this latest rover, they had a shot of the landscape, littered with rocks. I zoomed in and looked at the whole picture in detail. What was there, but a fuzzy critter next too one of the rocks. Either the picture was a hoax or was shot here on Earth. Fake news!