There are extraterrestrials among us. They landed four billion years ago when Earth was just forming. And they weren't ...
The likelihood of conventional forms of panspermia must therefore be considered low. However, the information content of dam-aged biological molecules might serve to seed new life (necropanspermia).
Radio Panspermia was based on the panspermia hypothesis, which proposes that life on earth may have come from bacteria distributed through interstellar space. People would carry radios small and ...