Here’s how much all life on Earth weighs, and how insignificant humans are by comparison

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Ever wonder how much mass the entirety of Earth’s lifeforms weigh? No? Well, scientists definitely do, and a new study published in the Proceedings of the National Academy of Sciences offers the surprising answer. Every living thing on Earth — from the tiniest bacteria to a mighty redwood tree — weighs a combined 550 gigatons when removing water from the equation. Yeah, that’s a lot.

One gigaton is equal to one trillion metric tons, to give you an idea of just how much mass we’re talking about here, but you’re probably going to be surprised by how little humans contribute to that total. As it turns out, the combined weights of many different classes of animals outweighs humans by a huge margin. Fish, for example, weigh roughly 0.7 GT C (gigatons of carbon), while viruses weigh around 0.2 GT C. Humans weigh even less than that.

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Here’s how much all life on Earth weighs, and how insignificant humans are by comparison originally appeared on BGR.com on Tue, 22 May 2018 at 18:36:03 EDT. Please see our terms for use of feeds.

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