Panspermia gets another boost.
For those who don’t know panspermia is the theory that life may not have started here on earth. It might have come on comets or meteoric dust particles that drift into the earth’s gravity well and then into the atmosphere.
The new boost is a test recently done where they applied plasmid DNA molecules to the outside of body panels of a spacecraft before launching. Then they checked after re-entry. All the panels they had painted with DNA still had salvageable DNA. And when they checked most of this DNA was still able to transmit genetic information to bacterial and connective tissue!
Now this was plasmid DNA, not a spore. It ‘survived’ launch, space and re-entry into the atmosphere. Not too shabby for a molecule.