Scientists in Australia have discovered that hugging trees helps koalas keep cool.
They used thermal cameras to reveal that in hotter weather, the animals moved to the lower, cooler parts of the trees.
The scientists also found that the koalas pressed their bodies even closer to the trunks.
So by hugging them more tightly on hotter days, koalas are able to lose heat without panting or losing water.
The team, led by the University of Melbourne in Australia, was studying how koalas regulated their temperature when they made the discovery.