Archaea Viruses Bacteria Protists Fungi Animals Arthropods Molluscs Nematodes Annelids Wild birds Fish Wild Humans Livestock Cnidarians Kingdoms of life Animals Plants 450 GT C 0.1 0.1 0.06 mammals 0.007 0.7 0.002 0.2 0.02 0.2 1 GT C 2 12 4 70 0.2 8 
 
 Measured in terms of carbon content (to factor out variable components like water), all life on Earth weighs about 550 gigatons. Finally, we highlight that the mass of humans is an order of magnitude higher than that of all wild mammals combined and report the historical impact of humanity on the global biomass of prominent taxa, including mammals, fish, and plants. Scientists have closely monitored the impact of humans on global biodiversity (39⇓–41), but less attention has been given to total biomass, resulting in high uncertainty regarding the impact of humanity on the biomass of vertebrates. Now domesticated cattle and pigs outweigh all wild mammals by 14 to 1, while the world's chickens triple the weight of all the wild birds, according to a study in the Monday, May 21, 2018, Proceedings of the National Academy of Sciences.
– A first-of-its-kind study reveals that humans make up a minuscule portion of life on the planet. As in 0.01%, reports the Guardian. The flip side of that? Despite the scant figure, humans have reshaped the animal kingdom, helping wipe out about 83% of mammals and half of all plants since civilization began, according to the comprehensive survey in the Proceedings of the National Academy of Sciences. For this study, researchers weren't counting individual members of species. This is all about weight—they surveyed the Earth's biomass, meaning the carbon content in living creatures. Start with this: All life on the planet weighs about 550 gigatons, notes Science. The new study breaks down that figure, including these highlights: Plants account for an astounding 82% of the planet's biomass Bacteria make up 13%—leaving just 5% for everything else beyond plants and bacteria Fungi (think yeast, mold, and mushrooms) make up 2% Ocean life makes up a surprisingly small 1% Chicken and other poultry make up 70% of all birds on the planet; only 30% are wild Livestock (mostly cows and pigs) make up 60% of all mammals; humans account for 36% of mammals, leaving only 4% as wild "The fact that the biomass of fungi exceeds that of all animals sort of puts us in our place," says Harvard biology professor James Hanken, who wasn't part of the study, per a release at Phys.org.