The Most Popular Sport in North America 900 Years Ago

Beneath the freeways of East St. Louis in Illinois there lie the ruins of a city built nearly a millennium ago, around towering earthen pyramids. Today called Cahokia, it held as many as 40 thousand people, and their influence spread throughout the southeast U.S. — mostly due the popularity of a game called chunkey. » 7/14/14 3:28pm 7/14/14 3:28pm

Why a Head Injury Can Be Far Worse Than You Realize

Each year in the United States, 2.5 million people will visit the ER for traumatic head injury. Of them, 50,000 will die. And those who do recover often exhibit lingering effects. It's a serious public health issue that's only getting worse. Here's what you need to know about protecting your head. » 4/01/14 2:45pm 4/01/14 2:45pm