A Teenager, A Gun, An Eye, And An Arm. Don't Worry. These Stories Have Happy Endings.

If you're into science and technology, you'll love these videos because they're totally sciencey and techy. But if you're not, don't worry. That’s not why my colleagues and I picked them. We wanted to share these stories because they are super cool reminders of what can happen when we use what we know to make people's lives better.