Re:Mars has right ingredients for present-day microbial life...
by astroflask on Saturday April 24, 2021 @05:50PM
(#26928476)
And also things that have gone to Mars in the past have blasted off chunks of Mars into Earth.
Perseverance's mission includes collecting and storing samples for a return mission. https://en.wikipedia.org/wiki/Mars_sample-return_mission