I think it's a problem that people are considered immoral if they're not religious. That's just not true. If you do something for a religious reason, you do it because you'll be rewarded in an afterlife or in this world. That's not quite as good as something you do for purely generous reasons.

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

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.

When it comes to the world around us, is there any choice but to explore?

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

When I was in school I liked math because all the problems had answers. Everything else seemed very subjective.

Sometimes models are surprisingly smart.