People that don't want to get down to the business at hand. Instead of just doing less, we have to find ways of doing more with less. That's the key to the future.

Burning carbon-based substances like oil, gas, and especially coal, produces billions of tons of extra carbon dioxide each year. Methane gas from cows and pigs and other animals on our large farms ends up in the atmosphere as well, trapping more of the sun's energy as heat.

Millennial voters are very concerned about climate change and will vote for candidates who are planning to address it. But the systems that are in place - people talk about gerrymandering and the money that's in politics, this is a real thing, a real effect - and it's hard for climate change-denying legislators to get voted out. But I predict it will happen.

The information you get from social media is not a substitute for academic discipline at all.

A two-and-a-half-year-old is pretty experienced at making a mess, anyway.

If you look back on all the teachers that you liked, I am sure you will find they were very entertaining.

I'll admit that the discovery of evolution is humbling, but it is also empowering. It transforms our relationship to the life around us. Instead of being outsiders watching the natural world go by, we are insiders. We are part of the process; we are the exquisite result of billions of years of natural research and development.