Fossil evidence shows ancient bees nested inside mammal tooth sockets approximately 20,000 years ago, the first known instance of such behavior.
The discovery came from cave deposits where small mammals died and their skulls provided sheltered cavities. Paleontologists said the find illuminates insect nesting habits during the late Pleistocene.
Bees commonly nest in wood, soil and plant stems; using bone cavities represents an unusual adaptation. Climate and vegetation changes at the time may have influenced available nesting sites.
The research was published amid broader interest in how pollinator behavior responded to Ice Age environmental shifts.
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Sources:
https://www.sciencedaily.com/