New research calls into question the validity of 'Dunbar's number'.
The claim that our brain size limits us to 150 meaningful friendships has been challenged by a recent paper.
Rather than distinctly male or female, the human brain is much more like the heart, kidneys and lungs – basically the same no matter the sex of the body it’s in.
The cetacean brain has a specialised thermogenic system that helps the animal’s brain to produce enough heat to maintain a functional brain temperature.
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.
Attempts to find brain structures responsible for supposed cognitive sex differences have not succeeded.
We have more neurons in our cortices than any other species, courtesy of an early technology – and along with them came our long, slow lives, with plenty of chances to gather around the dinner table.
A shift in climate, along with other environmental disruptions and the invasion of competitors and new predators all likely played an important role in reshaping ancient elephants’ brains.