... and if so, they were like something out of a Steven Erickson fantasy novel. This guy's skull was over 9 inches long.
https://www.theguardian.com/science/202 ... -evolution
The huge size is thought to be an adaptation to cold climates. With a head that big though, I can't help wondering about brainpower - and also whether a giant, cold-adapted branch of humanity might have inspired stories of trolls and ogres.