A marine version of the Stanford marshmallow experiment helped show cuttlefish can delay gratification.
For the past 50 years, international animal cognition research has focused on how tool use is related to animal intelligence. But new research casts doubt on long-held assumptions.
Life in captivity causes observable harm to the structure and function of large mammals' brains.
A quirk of psychology that affects the way people learn from others may have helped unlock the complicated technologies and rituals that human culture hinges on.