Other tell-tale features that link orangutans to humans, to the exclusion of chimps, bonobos, and gorillas? According to National Geographic, they have “greater asymmetries between the left and right side of the brain, an increased cartilage-to-bone ratio in the forearm, and similarly shaped shoulder blades.”
Disclaimer: Orangutans have a very close evolutionary connection to humans. Here’s a clear breakdown: Genetic similarity: Humans share about 97% of our DNA with orangutans, making them one of our closest living relatives (after chimpanzees and bonobos). Evolutionary connection: Orangutans, humans, gorillas, and chimpanzees all belong to the Hominidae family—the “great apes.” Humans and orangutans share a common ancestor that lived roughly 12–16 million years ago. Behavioral similarities: Orangutans are highly intelligent, capable of using tools, solving problems, and even learning aspects of human language when taught in captivity. They have complex social behaviors, though they are more solitary than other great apes.
