There are few things more joyful, if occasionally nerve-wracking, than having a pet in your home. And plenty of people agree.

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 Hill) – 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.

DEAR DR. ROACH: I read that in the 1700s, animal blood was transfused into humans to cure syphilis. Is this true? -- T.U. ANSWER: The story is a bit more complicated. Transfusion from animals into ...