total combined weight of all living humans currently on Earth is around three hundred and eighty-five million tons. That is the so-called biomass of our species. The biomass of our livestock—sheep, chickens, cows, and so on—is around eight hundred million tons. And the combined biomass of every other mammal and bird on Earth is less than one hundred million tons. All the whales and tigers and monkeys and deer and bears and, yes, even Canada geese—together, they weigh less than a third of what we weigh.
