Humans living at high latitude have bigger eyes and brains

Scientists have measured the eye sockets and brain volumes of 55 skulls from 12 populations across the world, and plotted the results against latitude. They found a positive relationship between absolute latitude and both eye socket size and cranial capacity. The skulls were from indigenous populations ranging from Scandinavia to Australia, Micronesia and North America. The largest brain cavities came from Scandinavia, while the smallest were from Micronesia.