25:04
How Large is the Universe?
15:46
How Can SPACE and TIME be part of the SAME THING?
1:05:54
Fermi Paradox - Where are all the aliens?
9:46
If the universe is only 14 billion years old, how can it be 92 billion light years wide?
25:56
Unveiling the Universe: Is Everything Alive?
19:03
The Living Universe is Unimaginably BIG and You're a Part of it!
42:14
Michio Kaku: The Universe in a Nutshell (Full Presentation) | Big Think
33:12