Watch Episode

How Many Trees Are There?
S4 E78 / 4m 15s
It may be an impossible questions, but we can at least get close.
Join Joe Hanson as he explores curiosity and illuminates the science behind… well, everything.
Video description: Wind is everywhere. The air is constantly moving, sometimes gently, sometimes violently. Why? Pressure, temperature and rotation come together to make wind. Here's how.