The Moon Is Off-Limits: Here's Why We Need To Respect It
39:25
Where Does EVERYTHING Come From? - Ask a Spaceman!
33:28
Are Atoms REALLY Mostly Empty Space?
33:08
Why is it so hard to return to the moon?
1:03:03
NVIDIA CEO Jensen Huang's Vision for the Future
16:29
Does Timescapes DISPROVE Dark Energy?
39:18
What is the Biggest Flaw in the Big Bang Theory?
37:36
Who Were The REAL Ancient Astronomers?
34:11