13:12

Water powered timers hidden in public restrooms

14:34

Bizarre traveling flame discovery

5:25

Simple machine/ Inclined plane

10:24

Penrose Unilluminable Room Is Impossible To Light

16:57

The Illusion Only Some People Can See

19:19

We should use this amazing mechanism that's inside a grasshopper leg

27:44

How many plants do you need to breathe? TESTED

27:23

I Tried Putting my Fluid Simulation on a Planet