Luxemburg
jtotheizzoe:

“If quantum mechanics hasn’t profoundly shocked you, you haven’t understood it yet.” - Niels Bohr
Put that in your pipe and smoke it.
Take a tour through the Big Questions of the origin, arrangement and future of the universe with these talks by Sean Carroll, Stephen Hawking and Brian Greene
j-wells:

Wibbly-wobbly, timey-wimey
Danceni, Moldova
cosascool:

 Lee Jung
DarkLight