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

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

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

Basically, I wasn't properly socialized, so it made sense to do physics.

You have to be careful when you use beauty as a guide. There are many theories people didn't think were beautiful at the time but did find beautiful later—and vice versa. I think simplicity is a good guide: The more economical a theory, the better.

When people try to use religion to address the natural world, science pushes back on it, and religion has to accommodate the results. Beliefs can be permanent, but beliefs can also be flexible. Personally, if I find out my belief is wrong, I change my mind. I think that's a good way to live.

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