A prostethtic makes all the difference when going for gold. Biomechanics can help pick up slight imbalances in a runner's form, so they can yield a better run time.

Engineers design safety helmets for players to protect their heads and brain while being comfortable and allowing the players to perform at their best.

The time keeping in the Olympics need extreme accuracy when measuring the difference between the first place winner and the other athletes. Precision and accuracy are very important to make sure the times are correct.

Sports isn't just about physical preparation. Mental preparation is important too! A sports psychology helps athletes perform in their bets mental state.

This clip explores the gap between how others perceive us and how we perceive ourselves. Each woman is the subject of two portraits drawn by FBI-trained forensic artist Gil Zamora: one based on her own description, and the other using a stranger's observations.