3 ms·

If anyone wants an introduction to the dark matter problem, I think this one is excellent: http://www.youtube.com/watch?v=77yXhAibQp4 http://www.youtube.com/wat

by derrida 15y ago

If anyone wants an introduction to the dark matter problem, I think this one is excellent: http://www.youtube.com/watch?v=77yXhAibQp4 http://www.youtube.com/watch?v=77yXhAibQp4