Humans pride ourselves on our ability to make plans for the future. But it turns out that we're not the only animals who think ahead. Scientists have observed wild orangutans planning their travel routes a day in advance, and communicating their itinerary to community members.
Orangutans spend their lives swinging in trees and eating fruit. Neither of those things is all that surprising for small animals that don't need tons of energy — but it's distinctly weird for such large primates to live that way.
Much like us, our hairier cousins have their own distinct facial features, unique combinations of jawlines, eye shapes, and nasal widths that make them recognizable on sight. But have you ever studied the differences between other primates' faces?