Fight or flight? How birds are helping to reveal the mysteries of evolution: A blend of natural and sexual selection sent birds skyward
New research from the University of Massachusetts Amherst uncovers the negative link between flight-worthiness and fight-worthiness in birds. Evolutionary pressure demanded that birds could either fly or arm themselves — but not both. Furthermore, the new research suggests that developing wings and not bony spurs involved both sexual and natural selection. This insight helps us […]