The CRISPR enzyme (green and red) binds to a stretch of double-stranded DNA (purple and red), preparing to snip out the faulty part. Illustration courtesy of Jennifer Doudna/UC Berkeley hide caption

itoggle caption Illustration courtesy of Jennifer Doudna/UC Berkeley

Jason DaSilva was on a family vacation in 2006 when he fell and couldn't get up. His multiple sclerosis symptoms have progressed to the point that he can't walk. Factory Release hide caption

itoggle caption Factory Release

Dorothea Handron suffered an infection after a surgeon unknowingly pierced her bowel during a hernia operation. She became so ill that doctors placed her in a medically induced coma for six weeks. Jim R. Bounds/AP Images for Kaiser Health News hide caption

itoggle caption Jim R. Bounds/AP Images for Kaiser Health News

Antidepressant use nationally fell by 31 percent among adolescents between 2000 and 2010. Suicide attempts increased by almost 22 percent. JustinLing/Flickr hide caption

itoggle caption JustinLing/Flickr

The company Proteus has developed a computer that attaches to a pill and tracks the pill's absorption into the body. The technology has passed clinical trials. iStock hide caption

itoggle caption iStock