Scientists just found a crazy network of tiny tunnels deep inside African and Middle Eastern rocks—and no one can explain them! These perfectly organized passageways look like something alive carved them millions of years ago, but there’s no trace of what did it. The leading theory? Some ancient microbe literally ate its way through solid stone, then vanished. If true, this could totally change what we know about where life can exist on Earth (and maybe even Mars). #Science #AncientMystery #ScienceNews