How rollercoasters affect your body - Brian D. Avery
18:03
The Real Physics of Roller Coaster Loops
4:20
What makes muscles grow? - Jeffrey Siegel
4:31
Jimmy and Kevin Hart Ride a Roller Coaster
4:59
How some friendships last — and others don’t - Iseult Gillespie
6:27
Why roller coaster loops aren't circular
5:26
Do you really need to take 10,000 steps a day? - Shannon Odell
4:47
Why is it so dangerous to step on a rusty nail? - Louise Thwaites
10:50