Why do fireflies flash in unison?

"One of the things I love about math the most is its really uncanny ability to reveal hidden patterns in our everyday lives, in nature, in the world around us."
Mathematician Steven Strogatz shares the excitement of discovery and how he's used math to uncover the synchronization in nature.
Steven Strogatz is the Jacob Gould Schurman Professor of Applied Mathematics in the College of Arts & Sciences at Cornell University.