The German physicist Albert Einstein needed complex equations to describe his theory of relativity, but 18-year-old Hillary Diane Andales of the Philippines does just fine with a pick-up truck, a few cell phones, and Usain Bolt.
Andales is the winner of the 2017 Breakthrough Junior Challenge, an annual competition that calls on teenagers across the world to submit videos no longer than three minutes that simplify big ideas in science or maths.
For her win, Andales took home the grand prize of $US250,000 in scholarship money.
