By: Ariana F.
We humans are the possibly the greatest evolutionary force on earth. We have caused entire species to become extinct, created new species, and changed the landscape of entire countries. A new study has found another change. In comparing the skull sizes of small mammals in both a city and rural environment, Dr. Snell-Rood found the skulls of the city animals to be bigger by 6%. She suggested that the change was due to the immense change in the environment she studied: Minnesota. (Read more…)