There's interesting theories behind humans evolving as a distance running (endurance hunting) species, and brain size being required evolutionarily as a tracking mechanism (understanding footprints & getting in the prey's head to understand it's path).
The two work in concert because fast prey escapes line of sight and gets mixed up with each other easily, so human endurance becomes much less useful if you can't follow & wear down the appropriate target.
"Born to Run" is a fun summary/story about some of this science but there's more hard science out there too if you're interested.
The two work in concert because fast prey escapes line of sight and gets mixed up with each other easily, so human endurance becomes much less useful if you can't follow & wear down the appropriate target.
"Born to Run" is a fun summary/story about some of this science but there's more hard science out there too if you're interested.