Why bigger isn’t necessarily faster: a look at animal speed limit

Larger animals are faster — but only to a certain point.

American skulls have significantly gotten larger in the past seven generations, and still growing

A new study from anthropologists at University of Tennessee¬†analyzed the skulls of caucasian American men and women from between the mid-1800s to the mid-1900s. Their findings showed that the average American’s skull today is larger and narrower than it used to be seven generations ago. In total, over 1,500 skulls have been analyzed, and though humans are taller, in general,