Alien Zombie Seed From Outerspace

Panspermia is the well-known theory that puts forth the notion that life on Earth could have originated from elsewhere in the cosmos, brought to Earth by a crashed celestial body such as a wayward comet, or carried on drifting space dust.  Many astrobiologists counter that radiation would kill any such organisms in space.  A new theory, necropanspermia has emerged that offers another possibility.  The theory posits that even if alien life arrived dead on arrival, fragments of DNA could have been enough to kick-start life on Earth.

Creative Commons Image: Nucleus by the kirbster on Flickr