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

Scientists actively approach the door to knowledge—the boundary of the domain of what we know. We question and explore and we change our views when facts and logic force us to do so. We are confident only in what we can verify through experiments or in what we can deduce from experimentally confirmed hypotheses.

I considered going into business or becoming a lawyer - not for the money, but for the thrill of problem-solving.

It's hubris to think that the way we see things is everything there is.

One of the nice things about math and science is it’s obvious, you get the answer or you don’t get the answer.

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

The universe has its secrets. Extra dimensions of space might be one of them. If so, the universe has been hiding those dimensions, protecting them, keeping them coyly under wraps. From a casual glance, you would never suspect a thing.