“Probably only humans have a more intensive relationship with their mothers,” according to Orangutan Foundation International. “Primatologists believe that orangutans have such long ‘childhoods’ because there is so much that they need to learn before they can live alone successfully.” Juvenile orangutans hang with mom till they’re about 8 years old, and nurse for pretty much the whole time. Get a look at some more adorable photos of baby animals with their mothers.