We certainly don't yet know all the answers. But the universe is about to be pried open.

You might find it hard to imagine gravity as a weak force, but consider that a small magnet can hold up a paper clip, even though the entire earth is pulling down on it.

All the normal matter in the Milky Way disc is denser than the dark matter that surrounds it.

You can be only a modest distance away from the gravity brane, and gravity will be incredibly weak.

I did not set out to explain the extinction of the dinosaurs. I'm a particle physicist, and I was actually thinking about dark matter along with some collaborators.

Faith just doesn't have anything to do with what I'm doing as a scientist. It's nice if you can believe in God, because then you see more of a purpose in things. Even if you don't, though, it doesn't mean that there's no purpose. It doesn't mean that there's no goodness. I think that there's a virtue in being good in and of itself. I think that one can work with the world we have.

Science is a combination of theory and experiment and the two together are how you make progress.