A planet needs more than location in a habitable zone. It needs the right ingredients, and salt has a surprising role.
Enceladus is an especially fascinating case. Nearly 100 geysers of water ice are currently jetting out of its south pole at supersonic speed.
Recent sensational headlines give astute readers occasion to contrast valid scientific inferences from leaps of faith based on worldview assumptions.
Dr. Tyson’s imagination wanders from Enceladus, a moon of Saturn, to the Cambrian explosion.
These episodes will slip in smoothly in public school science classrooms, someday when all the schools reopen.