People have evolved to be smarter and taller than their predecessors, a study of populations around the world suggests.
Those who are born to parents from diverse genetic backgrounds tend to be taller and have sharper thinking skills than others, the major international study has found.
Researchers analysed health and genetic information from more than 100 studies carried out around the world.
These included details on more than 350,000 people from urban and rural communities.
The team found that greater genetic diversity is linked to increased height. It is also associated with better cognitive skills, as well as higher levels of education.