Tiny Life Survives Asteroid-Scale Shock in Lithopanspermia Test

Johns Hopkins researchers simulated the harsh journey life might take on a rock traveling between planets, blasting Deinococcus radiodurans between metal plates at speeds up to 300 mph to mimic asteroid ejection from Mars. The microbes withstood 1–3 gigapascals of pressure, with only some internal damage, while the steel plates failed. The study lends support to the lithopanspermia idea that life could hitch rides on asteroids, but it remains unproven and limited in scope, and it underscores the need for planetary protection and further testing on other extremophiles.