Study: Monkeys are much smarter than we thought they were •

Wasps are smarter than we thought, a new study shows

Monkey minds: what we can learn from primate personality

Are Monkeys Smart? Everything We Know About the Monkey Brain and IQ - A-Z Animals

Bonobo guide: where they live, how they're related to chimps, and why they have such a fascinating society - Discover Wildlife

Chimp brains reveal secret of why humans are much smarter

Monkey, Definition, Characteristics, Types, Classification, & Facts

Studies: Crows count, chimps know when they're right

Why scientists believe dogs are smarter than we give them credit for - Vox

Chimpanzees: Almost Human, and Sometimes Smarter - The New York Times