After an electric car, other vehicles just seem like old-tech, gas-burning, pollution-making throwback machines. Which, frankly, they are.

Psychologists and neuroscientists have coined the phrase, embodied cognition. When your brain directs your body to do something, your body, in a sense, directs your brain to feel something.

It's survival of the good-enough.

One of the great challenges in reconstructing a mass extinction is making sense of what happened when. In the same way we have divided living things into a hierarchy of divisions—domain, kingdom, phylum, class, order, family, genus, and species—geologists have broken apart the long history of our planet into eon, era, period, epoch, and age.

When Rush Limbaugh says I'm not a scientist, I'm charmed - I smirk.

We are all aware that evolution happens, because we all have parents.

Teaching creationism in science class as an alternative to evolution is inappropriate.

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

Biologists discovered the microbiome just over the past couple of decades. They are still puzzling out how the microbes in your body help keep you healthy and well nourished. A person's microbiome might even be an important factor in controlling his or her obesity.

If the Earth gets hit by an asteroid, it's game over. It's control-alt-delete for civilization.

Even the majority of the cells in your body are microorganisms. They outnumber the cells of your body by 10 to 1. Those microbes are living, metabolizing chemicals, producing waste chemicals, and interacting with each other. Collectively, they are known as your microbiome. You are their ecosystem. It's wild.

No other organism on Earth does that. Yes, yes, I understand that dolphins are very smart, but I don't think they build libraries or even contemplate such a project.

Our ancestors who did not have a fear of heights, who did not have a fear of eating something poisonous, who did not have a fear of venomous snakes and spiders, who were not afraid of drowning, well—they're dead.

Nature ended up with the deoxyribonucleic acid molecule, DNA.

As you may know, I am a mechanical engineer.

Humor is everywhere, in that there's irony in just about anything a human does.

In my opinion, the sexiest thing about a woman is her smile. If the woman doesn't smile, or doesn't smile well, men will not dig her. They will look for other women, who smile well. What's involved in smiling? Good teeth, attentiveness, engaging eyes, and the ability to be happy. Each of these is an apparently inheritable trait.

A woman came up to Michael Faraday after he performed this demonstration and asked: But, Mr. Faraday, of what use is it? Faraday famously replied, Madam, of what use is a newborn babe?

Unlike science, creationism cannot predict anything, and it cannot provide satisfactory answers about the past.

Earth is currently reckoned to be 4.54 billion years old. Based on fossilized mats or layers of bacteria, we figure life got started here at least 3.5 billion years ago.

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

If the world and all its species of animals and plants were created at once by some supernatural force or event, we might expect nothing but the fossils of familiar, living species as we dig down in Earth's crust.

I've got no problem with anybody's religion. But if you go claiming the Earth is only 10,000 years old, that's just wrong.

We are all one race. The only difference is the color of our skin, and that comes from how close your ancestors lived to the Equator or at high altitudes like Tibetans. There have always been tribes, but what we have to appreciate now is that we live in a global community. And tribal loyalties…they're not relevant to our future.

I've always loved airplanes and flight. The space program was really important to me as a kid. I still have a photo of Armstrong and Aldrin on the moon in my living room.

You're dressed in a tuxedo, you wear a bow tie. A bow tie with a tuxedo is more formal than a straight tie with a tuxedo.

Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

Everybody who's a physician, who makes vaccines, who wants to find the cure for cancer. Everybody who wants to do any medical good for humankind got the passion for that before he or she was 10.

If NASA is to reach beyond the Moon and someday reach Mars, it must be relieved of the burden of launching people and cargo to low earth orbit. To do that, we must invest more in commercial spaceflight.

It's survival of the hang-in-there's, or the made-the-cuts, or the just good-enoughs.

At some level, as an altruistic human (a consequence of my evolutionary heritage), I feel bad for the creationists. They have been left out of the wonderful process of science and its ability to reveal so much about nature. I'm heartbroken for their kids.

We all have DNA, and it's nearly the same. In rhesus monkeys, we're close to 93 percent the same. In mice, it's closer to 90 percent overall.

I really believe in science. It is a faith. It is a reverence akin to religion. But as we always say, it's different from religion in that, as near as we can tell, it exists outside of us. It has an objective quality, the process of science.

The(re is no) End.

There's nothing I believe in more strongly than getting young people interested in science and engineering, for a better tomorrow, for all humankind.

Science rules!

The word purebred is something we can define by counting generations back in dog-sex land. But it is not an indication of species or anything special, really.

As a kid at the World's Fair in 1965, I missed seeing the big global population clock roll over from 2,999,999,999 to 3 billion - I was really disappointed.

As I write, we now consider nature to have given rise to three or four foundational types of living things, or domains of life. I'm going with four. We have Bacteria, Archaea (microbes that are fundamentally different from bacteria), Eukarya (that's us, animals and plants together), and Vira. You could also call that last one Viruses.

Winter lingered so long in the lap of Spring that it occasioned a great deal of talk.

If you have this idea that the earth is only 6,000 years old, you are denying, if you will, everything that you can touch and see. You're not paying attention to what's happening in the universe around you.

Television isn't inherently good or bad. You go to a bookstore, there are how many thousands of books, but how many of those do you want? Five? Television's the same way. If you're going to show people stuff, television is the way to go. Words and pictures show things.

What would we learn from an alien? It could be astonishing. We'd quickly find out if life necessarily needs a genetic code, a cell membrane, similar kinds of appendages, and familiar sorts of sensory organs.

In terrestrial life, the characteristic elements in a membrane are carbon, nitrogen, potassium, and sodium. There's a place to start … unless Europan life came up with a totally different way to make a membrane. Then how would you find it? If you like this kind of thinking, consider becoming an astrobiologist.

Evolution, and the selection of reproduction-worthy genes that drives it, is the opposite of random. It is a sieve that living things have to pass through successfully, or we never see them again.

It would take a big change in Earth's geology and chemistry for it to become exactly like Venus. But humans are pouring carbon dioxide into Earth's atmosphere right now at an alarming rate, shoving our climate in that high-carbon direction, which is a terrifying prospect. We do not want to become even a little like Venus.

I worked at comedy clubs - if I can use the term 'work' - for several years. I middled at one point. I never made it; I was never a headliner. I never made enough time to write enough good material, in my opinion.

Fossil-fuel plants pay virtually none of the cost of dumping greenhouse gases and other pollutants into the air. Instead, we all pay for it. If the cost of global warming is included, fossil fuels are the most expensive thing you can think of.

It's important that our children are raised to be educated, well-rounded tax-paying citizens that understand the importance of technology and science.