Elephants gathered at a watering hole in the relative safety of Serengeti National Park. In unprotected areas with dense human populations, the animals showed higher stress hormone levels.
The importance of food, jealousy, and paternal care in the evolution of owl monkey monogamy
La importancia del alimento, los celos y el cuidado paternal en la evolución de la monogamia en el mono mirikiná
Comparing the rewards of small-scale farming to those recounted by Thoreau
Conspicuous armaments are good visual proxies for fighting ability.