The Evolution of Laughter
June 20, 2009
Researchers found apes, chimps, gorillas, and humans all laugh alike, and that it all stems from a 10-million year-old relative.
Last updated on June 1, 2012 at 19:03 EDT
Researchers found apes, chimps, gorillas, and humans all laugh alike, and that it all stems from a 10-million year-old relative.