Deep Biosphere: Underground life has a carbon mass hundreds of times larger than humans’ Naftali Hirschl, PhD. Allgemein, Investment & Nachhaltigkeit, Nachhaltigkeit 11.12.2018 2 Minutes Microorganisms living underneath the surface of the earth have a total carbon mass of 15 to 23 billion tons, hundreds of times more than that of humans, according to findings announced by the Deep Carbon Observatory and coauthored by UT Pro... Please register here, or login below. Username or E-mail Password Remember Me Forgot Password Published by Naftali Hirschl, PhD. View all posts by Naftali Hirschl, PhD. Published 11.12.2018