The reason we all look different? To avoid interbreeding:
Unique facial features evolved to help identify family members
* Scientists in
Exeter and New York reveal why we don't look the same
* They say primates
developed the ability to make groups recognisable and stop interbreeding among
species that were quite self-contained
* Study was based on
observations of African monkeys called guenons
* It was found they
were oddly diverse, suggesting a lack of interbreeding, despite living in
groups in close proximity to each other
* This suggests they,
and other primates, developed widely differing features