As a reward to the all the dedicated fans who completed our demographic survey, we released this special episode of Astronomy Cast. As promised, we're now releasing this episode to all of our subscribers. Panspermia is a controversial theory that life on Earth originated... out there. Maybe it started out in a cosmic dust cloud or originated from another planet, but somehow the very first lifeforms made the trip through the vacuum of space and colonized our home planet.

<strong><a href="http://media.libsyn.com/media/astronomycast/AstroCast-070904.mp3">Special Episode: Panspermia (11.1MB)</a></strong><br />&nbsp;<br />

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Panspermia: Physeters from outer space.

I really liked the Panspermia-episode but I'm quite sure the Japanese scientists used nucleotides (and no aminoacids!) to introduce "E=mc2" in a bacterial genome.
Aminoacids are the buildingblocks of proteins. DNA consists of nucleotides.