Here are some interesting facts about koalas:

• Koalas are marsupials, not bears, and have a pouch where their underdeveloped newborns, called joeys, continue growing after birth.

• They mainly eat eucalyptus leaves, which are poisonous to most animals, but koalas have specialized enzymes and gut bacteria to digest these toxic leaves safely.

• Koalas rarely drink water because they get most of their moisture from eucalyptus leaves; their name even means "no drink" in an Aboriginal language.

• They can sleep up to 18-22 hours a day to conserve energy due to their low-calorie diet.

• Koalas prefer a solitary lifestyle, are territorial, and have a strong sense of smell to choose the best eucalyptus leaves and detect other koalas.

• They have two opposable thumbs on each forepaw, helping them grip trees effectively for climbing, along with sharp claws.

• Koalas have fingerprints similar to humans, which is rare among animals.

• Baby koalas are born blind and earless, then crawl into their mother's pouch where they stay for about six months.

• Males are known as "boomers" and females as "does" in koala terminology.

• Koalas have a specialized digestive organ called a caecum, which helps them break down the tough eucalyptus leaves.

These facts highlight the uniqueness and fascinating adaptations of koalas to their environment and diet.