In case you wanted to know, that's 20 quadrillion. That’s roughly 2.5 million ants per person on Earth. In a study published this week in the peer-reviewed Proceedings of the National Academy of Sciences journal, scientists said they analyzed nearly 500 ant population studies from around the globe – spanning all the continents and types of habitats. In total, the world’s ants have a biomass of 12 million tons of carbon, the study found. That’s larger than the combined biomass of wild birds and mammals, according to the study, and equals one-fifth the total biomass of humans. But carbon only makes up about half of an ant’s weight, so the total mass of ants is actually much larger, researchers said. Visit the link in bio for more information on the number of ants in the world.