Came across a wild note: polymetallic nodules on the deep seafloor — those rock‑looking ‘metal potatoes’ — actually host entire miniature ecosystems, with life forms you don’t see anywhere else. It’s neat to think whole communities can cling to a pebble, adapted to an insane environment. Got me wondering about smaller‑scale surprises in everyday life: what tiny, unexpected ecosystems or micro‑worlds have you found (a mossy rock full of critters, a backyard puddle with a whole population, an attic colony of moths)? Any cool close‑up photos or stories?