Infographic illustration showing all the biomass of animal life on Earth. One cube represents 1 million metric tons of carbon. The most dominant form of animal life on the planet are marine arthropods, measuring 1 gigaton of carbon (Gt C). Birds make up the smallest amount of carbon weight in the entire animal kingdom at just 0.002 Gt C. This visualization is based on data by Bar-On et al, The Biomass Distribution on Earth, PNAS, 2018.