Cross-species matings

In a few science fiction series (the Star Trek Franchise being the most notable), humans can have sex with extra-terrestrial species and produce healthy children. This is, of course, absolutely ridiculous; species are defined by their inability and/or unwillingness to mate and produce fertile offspring. Even taking into account the possibility of panspermia, a human would have more in common genetically with a daylily than with an extra-terrestrial.

Cross-species mating in Star Trek

Notable products of cross-species matings include:

• Spock
• Deanna Troi
• B'Elanna Torres
• Sela
• K'Ehleyr
• Alexander Rozhenko