Head scratching
Until now, it was thought only humans, gorillas and chimps were either right or left-handed, but the Pacific crow's preference means that it may change the way doctors think we become right-handed. Or left for that matter.
It was thought that humans are mainly right-handed because the part of the brain used for speech is also the part used to move the body's right side.
The discovery of "right-clawed-ness" in crows now suggests it's something more general like the problem-solving ability we see in both crows and chimps.
Hear story!
