If you want grown-ups to recycle, just tell their kids the importance of recycling, and they'll be all over it.

The Big Bang banged, and for some reason we’re here. And that’s astonishing. And that we can understand that, that’s the most astonishing.

There is no debate in the scientific community...We need [Congress] to change things, not to deny what's happening.

From an evolutionary standpoint you can't just wipe everything out and start over, and I don't think you can do it in the school system either.

Promoting a religious agenda that is to apply to every citizen is inconsistent with our laws in the US. It seems to me that your community and mine can live and work together without conflict.

Climate change is a real deal. So, hey deniers - cut it out, and let's get to work.

I am so old, I entered engineering school with a slide rule. And I left engineering school with a calculator. I can still use a slide rule but it's not a skill you especially need anymore.