On Alien Worlds, Extraterrestrials Could Be Spewing a Toxic, Smelly Gas. That's How We Could Find Them. - Live Science

On Alien Worlds, Extraterrestrials Could Be Spewing a Toxic, Smelly Gas. That's How We Could Find Them.  Live Science

BELLEVUE, Wash. — Phosphine, a horrible-smelling gas that's toxic to life on Earth, could signal the existence of alien life-forms elsewhere in the universe.