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On one of the uninhabited pacific islands of Palau, there is a lake. Once upon a time this lake was connected to the sea. This connection closed and any predators still in the lake died soon after leaving native jellyfish isolated. The jellyfish stingers devolved to the point where they don’t sting human skin, making [...]

The Naked Mole Rat is the only other mammal known to exhibit eusocial behavior; a behavior that would otherwise be exclusive to ants, bees, wasps, termites, and sci-fi sequels from the 80s. Heterocephalus glaber A rodent which lives in colonies underground, digging with its enlarged front teeth. Only one female in a colony breed, and [...]