Exactly in what way do they describe us evolving?
Ah here it is:
Quote:
The researchers analysed data from the international haplotype map of the human genome, and analysed genetic markers in 270 people from four groups: Han Chinese, Japanese, Africa's Yoruba and northern Europeans.
They found that at least 7% of human genes have undergone recent evolution. The changes include lighter skin and blue eyes in northern Europe and partial resistance to diseases such as malaria among some African populations, according to the study in Proceedings of the National Academy of Sciences.
Some of the changes were tracked back to just 5,000 years ago, and "today they are in 30 or 40% of people because they [are] such an advantage," said Hawks.
Many Chinese and African adults cannot digest lactose in milk, but across Europe a lactose-tolerance gene is now widespread. One reason is thought to be that at northern latitudes sunlight is weaker, so people make less vitamin D in their skin. Vitamin D is crucial for absorbing calcium, so being able to digest milk throughout life made people in colder climes healthier.
|
However, I'm not sure how accurate 270 people can represent the overall 6 billion + of us worldwide.... but it's not too bad of a study for loose examples.