What is dark matter? – with Peter Fisher
59:40
Mapping the universe: dark energy, black holes, and gravity – with Chris Clarkson
45:18
Where Did Dark Matter And Dark Energy Come From?
56:43
Is interstellar travel possible? – with Les Johnson
1:04:09
Why we have not discovered dark matter: A theorist’s apology
1:10:31
Is Dark Energy Decaying?
26:23
The Dark Energy Delusion | Claudia de Rham Public Lecture
53:41
The Physics of Black Holes - with Chris Impey
34:16