Anthropologists have found the rate of human evolution to be increasing. As human mating behaviors have developed over the last 10,000 years, we have also developed a system for increasing adaptive genetic mutations. The researchers give the ability to digest lactose that has evolved in humans over the last 3,000 years as an indicator of such rapid evolution. Studies are also being conducted on mate selection and possible links to predispositions toward autism. Mate selection, modern lifestyle, and increasing population may all play a role in where humanity is heading.