Ms. Sifferlin is an Opinion health and science editor and the author of the forthcoming book “The Elusive Body: Patients, ...

The Amazon rainforest is often associated with jaguars, parrots, and towering trees. Yet the majority of animal life in this ...

John E. Woodmansee Photo: Tobacco hornworm on a tomato plant that has been attacked by a parasitic Braconid wasp. The white capsules on its back are the pupal stage of the tiny wasp. Braconid larvae ...