Think back to high school. What did you do in your spare time? Hang out at the mall, go to the movies, talk on the phone with your friends? Well, I know what I wasn't doing in my spare time, finding a cure for cancer.

But, that's exactly what 17-year-old Angela Zhang of Cupertino, California did. She says she started her freshman year, reading studies and medical journals.

It all led to her discovering something that, at least in mice, will cure cancer. It'll be years before we know if it works for humans, but let's hope so.