Ants have been on earth for nearly one hundred million years, well before human beings made their appearance. They were around when dinosaurs walked the earth, and survived whatever it was that destroyed those massive beasts. And then their population exploded a few million years later. The ant population is large, some estimates placing it in many thousands of trillions. They constitute between fifteen to twenty per cent of the terrestrial animal biomass; more than all humans and mammals combined! They build large, complex colonies and organise themselves efficiently along job specialisation:
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