Will we know extraterrestrial life when we see it?
Recognizing life on other worlds requires wiggle room in the definition of what it means to be alive
LIFE ON MARS A Martian microbe, envisioned by planetary geologist Kathie Thomas-Keprta, would need a tough outer wall to withstand the elements and magnetic crystals to help it navigate.
K. Thomas-Keprta/NASA Johnson Space Ctr.
In a 1967 episode of Star Trek, Captain Kirk and crew investigated the mysterious murders of miners on the planet Janus VI.