In two previous posts I’ve looked at different versions of panspermia, the idea that life may have originated elsewhere in our Galaxy and may have travelled to our planet early in its formation, giving rise to all of the life we see on Earth today.
In post 1 I introduced the idea, and looked at how simple bacterial life could travel to the Earth, and in post 2 I looked at some more extreme versions of panspermia, including the idea that intelligent aliens could have deliberately seeded the Earth with life.
You may have also seen in the news recently that a NASA scientist called Richard Hoover has claimed he has found fossilized bacteria in a number of meteorites.
What does this mean for panspermia? Unfortunately, probably not much. Find out why…
Astrobioloblog 