Guest Opinion. Altruism is helping without a benefit and sometimes at a risk to one’s self. Animals helping others of their own species makes sense to perpetuate the species or help continue their own ...

The persistent presence of humans and their infrastructure in U.S. national parks has yielded dramatic changes in the behaviors of large animals who live there, a new study has found. Even during the ...

A late-night journey of a fox and an otter raises questions about conservation, human development, and animal resilience.

Around 6,500 years ago, hunter-gatherer communities across Eurasia were settling down and living with livestock — and the animals’ diseases came along for the ride. A massive genomic analysis of ...