The Four Most Promising Worlds for Alien Life in the Solar System

The Earth’s biosphere contains all the known ingredients necessary for life as we know it. Broadly speaking these are: liquid water, at least one source of energy, and an inventory of biologically useful elements and molecules. But the recent discovery of possibly biogenic phosphine in the clouds of Venus reminds us that at least some … Continue reading The Four Most Promising Worlds for Alien Life in the Solar System