Wormhole Questions
17:08
Gravitational Waves (extra footage)
16:03
Physics Education - (Ed extended footage)
12:35
Dark Matter (extra footage)
2:29:36
The Best Relaxing Classical Music Ever By Mozart - Relaxation Meditation Reading Focus
17:26
Cosmic Microwave Background Radiation - Sixty Symbols
12:04
Quarks (extra footage)
0:33
Keprekar's Constant
13:13