Human beings are often said to be the only animals who truly have a “mind” in the way that term is commonly used. But that view has been challenged over the past several decades. That challenge arises ...

A rhesus macaque on Cayo Santiago, which is less than a mile east of Puerto Rico. Rhesus macaques spend upwards of 20 percent of their time engaged in cooperative behaviors like grooming. Andi ...

Ecologists have long sought clarity on the dietary habits of different animal species. For scientists, it wasn't obvious how herbivores in Yellowstone National Park, who subsist on grasses, ...