A new theory argues humans evolved through competition
Megan Scudellari and Mark Belan write: A surprising discovery about human evolution began with a research study about, surprisingly, birds. Five years ago, evolutionary biologist Laura van Holstein at the University of Cambridge read a study on the role of competition in songbird evolution. The work, from an international team of evolutionary biologists, found that competition between interacting species of songbirds—over food, mates, and territory—drove the evolution of new traits, such as beak shape, across long timescales and large distances…