“Current estimates suggest that half of all the living matter on Earth lives underground, at depths of up to 5km. Some people think the share may be bigger than that. Indeed, there is loose talk of life having originated more than once in the distant past, and of there being entire shadow biospheres of organisms completely unrelated to anything on the surface.”
Read this in an Economist article this morning. Blew my mind. Gotta love it how every time we think we know something, nature throws us a new doozy.
“Shadow Biosphere”
Bookmarked in Delicious.
