The extreme life of LUCA.
Here are the leading theories on where that first spark of life came from.
This newly discovered die-hard crab literally lives on the edge, where few other species can survive: on the chimneys of hydrothermal vents in the Antarctic Ocean.
New data from NASA’s Cassini spacecraft reveals that Enceladus’s subterranean ocean completely separates its crust from core. But scientists are still unsure why it hasn’t frozen solid.