Was Einstein "wrong"? | Testing new theories of gravity
20:18
Is the strength of gravity really CONSTANT? | Solving the crisis in cosmology
16:42
How does Mercury's orbit prove General Relativity?
16:15
The Bullseye Galaxy: Nine rings for a galaxy collision, doomed to die
5:28
How we know that Einstein's General Relativity can't be quite right
14:54
MORE evidence AGAINST dark matter? | What does the GAIA data actually show?
17:34
How Gravity Actually Works
24:26
How did we measure the fastest speed there is? | The History of the Speed of Light Part I
22:00