Why are these so popular???
11:59
Why do climbers use these?
22:47
Are Sharpies on Climbing Ropes Safe? Break tests with Sharpie Permanent Markers vs Beal Rope Marker
23:05
This Should Be Impossible...
17:57
Gearless Magnet Bike
29:47
ROBOFORMING: The Future of Metalworking? (I Had NO IDEA This Was Possible) - Smarter Every Day 290
16:53
Melting Copper Wire Into a River Table
13:59
So, are any of these safe?
18:49