Furthermore, the idea that their brains are "cramped" is a misconception. A koala’s brain actually floats in cerebrospinal fluid inside the skull, occupying only about 60% of the cranial cavity. This fluid acts as a shock absorber—a vital adaptation for an animal that spends its life falling out of trees. Koalas can fall from heights of up to 15 meters without sustaining brain damage, thanks to this cushioning.
Koalas are listed as Vulnerable on the IUCN Red List. Their populations are threatened by habitat loss due to deforestation, bushfires, and diseases. dumb koala
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