Power causes brain damage

How leaders lose mental capacities—most notably for reading other people—that were essential to their rise.

The blood of the crab

Horseshoe crab blood is an irreplaceable medical marvel—and so biomedical companies are bleeding 500,000 every year. Can this creature that’s been around since the dinosaurs be saved?

Why I gave my kidney to a stranger

“…I was selfishly, deeply gratified to have made at least one choice in my life that I know beyond a shadow of a doubt was the right one.”

How the world’s heaviest man lost it all

Paul Mason used to weigh close to 1,000 pounds. Now that he’s shed almost all of it, freeing himself from his tomb of a body, he’s facing a question that’s heavy in its own right: How should he spend the rest of his life?

Do humans need dairy?

Milk has been part of the human diet for thousands of years – but what does the latest research say about whether we can safely consume diary?