A dark internet legend claims a swarm of monstrous crabs consumed Amelia Earhart's remains on a remote Pacific island. The story is a myth, but the creature at its center is very real, and its true biology is far more fascinating. We explore the coconut crab, the largest living terrestrial arthropod on Earth: a creature that scales trees, hunts seabirds, can live a century, and will drown if dropped into a bucket of water.

We unpack its identity crisis as a hermit crab that abandoned the borrowed-shell lifestyle to break its growth ceiling, biomineralizing its own armor instead. We explore the branchiostegal lung it must keep wet to breathe, the insect-like antennae it evolved through convergent evolution to smell on the wind, its methodical multi-day technique for cracking coconuts, and the perilous ocean-bound reproductive cycle that keep ...