Is it illness — or simply normal? A GP reflects on two powerful cases that reveal why context, family history and perspective matter just as much as test results in modern medicine.

"Monogenic" diseases, triggered by mutations in just one gene, may actually be more complex than scientists thought.

Dolphins in Florida Bay have a clever hunting trick. They create mud rings to trap fish. This special skill spreads through dolphin groups. Males and females learn differently. This learned behavior ...