How Radiation Sickness Works

Fortunately, science has very few instances where humans have been exposed to acute radiation poisoning to study for clues to treating radiation sickness. They have found, though, that those few instances have been grave.

How Leper Colonies Worked

Leprosy, also known as Hansen's disease, used to mean a one-way ticket to banishment. But once medicine trained its sights on wiping out what might be the most ancient disease to afflict humans, it has become treatable and even accepted.

Sugar: It Powers the Earth

Since sugar spread from Polynesia a few thousand years ago, the world has been crazy for it. Insanely high prices, wars and even slavery couldn't undo world's need for a sugar fix. Today that fix is responsible for the obesity epidemic facing the West.