How many ants are alive on Earth right now?

Ants live on every continent except Antarctica. In 2022 researchers pulled together surveys from around the world to estimate the total. How many did they count?

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Around 20 quadrillion, and the authors call that conservative. It works out at about 2.5 million ants for every human, and together they outweigh all the world's wild birds and mammals combined.

— Patrick Schultheiss, Sabine Nooten and colleagues, The abundance, biomass, and distribution of ants on Earth — PNAS, 2022

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