Oldest ever fossil evidence for modern bees

Nests that are 100 million years old seem to offer the oldest fossil evidence for modern bees. The tunnels and structures inside the nests closely match those created by modern bees in the Halictidae family — also called sweat bees — and particularly to the Halictini tribe. The finding supports other evidence showing that bees and flowers diversified around the same time, during the early Cretaceous.