Life in Deep Earth totals 15 to 23 billion tons of carbon — hundreds of times more than humans

Life in Deep Earth totals 15 to 23 billion tons of carbon — hundreds of times more than humans
https://www.sciencedaily.com/releases/2018/12/181210101909.htm

Barely living ‘zombie’ bacteria and other forms of life constitute an immense amount of carbon deep within Earth’s subsurface — 245 to 385 times greater than the carbon mass of all humans on the surface, according to Deep Carbon Observatory scientists nearing the end of a 10-year international collaboration to reveal Earth’s innermost secrets.