Astronomers used a 3D global computer model to compare the climates of exoplanets in different stellar and orbital configurations. They found that a planet orbiting a white dwarf star would offer a ...

New research suggests Earth was once a purple planet. Early microbes used retinal, not chlorophyll, for photosynthesis.

The "Green Squad" is a specialized unit of the Peruvian National Police, focused on combating minor crimes and offenses that ...