Female giraffes drove the evolution of long giraffe necks in order to feed on the most nutritious leaves, new research suggests
- Written by Douglas R. Cavener, Huck Distinguished Chair in Evolutionary Genetics and Professor of Biology, Penn State
Everything in biology ultimately boils down to food and sex. To survive as an individual you need food. To survive as a species you need sex.
Not surprisingly then, the age-old question of why giraffes have long necks has centered around food and sex. After debating this question for the past 150 years, biologists still...









