A Chin-Stroking Mystery: Why Are Humans the Only Animals With Chins?
www.smithsonianmag.com
It's an evolutionary conundrum, and scientists are still divided over the answer
  • jadero@lemmy.ca
    3·
    11 months ago

    Gauges measured stress on the metacarpals during punches and slaps on padded-dumbbell targets created with a pendulum-like device.

    I take “a pendulum-like device” to mean they suspended either the arms or the targets and swung them to a collision.