“Look what we’ve started. This is so exciting.”

More than a century ago, scientists predicted that a cure for cancer was just five years away. So what happened? Here's what we know now that we didn't know then.

American children are getting fatter every year. Poor eating habits, lack of exercise, insufficient sleep and too much time sitting in front of electronic devices have snowballed into a health crisis with no end in sight.

“We have to be really careful about health and diet and exercise, and keeping lean. If glucose can drive cancer growth, then patients with esophageal cancer probably have to be careful about their diet, their glucose intake, and make sure they're speaking to their medical professionals to get advice.”

In 2006, Shinya Yamanaka, a Japanese stem cell researcher, made a groundbreaking discovery that would win him the Nobel Prize. Yamanaka discovered a new way to turn adult, dividing cells into pluripotent stem cells.