Experiencing a traumatic event such as surviving a plane crash can result in symptoms of post-traumatic stress, but everybody experiences these symptoms differently, and scientists are not sure why.

He had no bruises, scratches or cuts. No external evidence of head trauma, like a scalp injury or a skull fracture. No broken bones. No symptoms of neglect or malnutrition. Nick and Felecia were ...

The story was originally just about Teich — a family friend of mine who was kidnapped at gunpoint 50 years ago, in 1974 — but as the article began its discussion of trauma, I chose to ...