Tiny Earth Life Grew in Water Like a Saturn Moon's Ocean

A tiny living thing from Earth grew in water copied from a distant moon. The microbe M. okinawensis, which makes methane and lives in Okinawa Trough vents, survived lab water with salts, carbonates and crushed rock, even at very alkaline pH 11. It turns hydrogen and carbon dioxide into methane. Saturn's moon Enceladus is 300 miles wide. In Science Advances.