Dogs rub their faces after eating for many reasons, from normal grooming to allergies or dental pain. Here's how to tell if your dog's habit needs a vet visit.
The medical model views illness as a biological problem to diagnose and treat. Here's what that means, where it falls short, and how it compares to broader approaches.
From DNA and silk to plastic and nylon, polymers are everywhere. Explore the natural and synthetic polymers found in your body, home, clothing, and medicine.