10yearsnoaccount t1_j1bi2du wrote on December 23, 2022 at 1:58 AM Reply to comment by me_too_999 in Mars' ancient atmosphere may not have had much oxygen after all by pecika That solar UV exposure does indeed kill bacteria.... earth's surface was pretty much uninhabitable until ozone started forming Permalink Parent 1
10yearsnoaccount t1_j1bi2du wrote
Reply to comment by me_too_999 in Mars' ancient atmosphere may not have had much oxygen after all by pecika
That solar UV exposure does indeed kill bacteria.... earth's surface was pretty much uninhabitable until ozone started forming