"I went to Monsanto, and I spent a lot of time with the scientists there, and I have revised my outlook, and I'm very excited about telling the world. When you’re in love, you want to tell the world."

"We have overwhelming evidence that the climate is changing. That you cannot tie any one event to that is not the same as doubt about the whole thing. There is no debate in the scientific community."

"Was it appropriate to jail the guys from Enron? ... Was it appropriate to jail people from the cigarette industry who insisted that this addictive product was not addictive, and so on? ... In these cases, for me, as a taxpayer and voter, the introduction of this extreme doubt about climate change is affecting my quality of life as a public citizen. ... That there is a chilling effect on scientists who are in extreme doubt about climate change, I think that is good."

"Nature is bottom up. It's compelling and complex, and it fills me with joy and it's inconsistent with the top down view."

"I just want to remind us all there are billions of people in the world who are deeply religious, who get enriched by the wonderful sense of community by their religion. But these same people do not embrace the extraordinary view that the Earth is somehow only 6,000 years old."

"You don’t need a PhD in climate science to understand what’s going on, that we have overwhelming evidence that the climate is changing. That you cannot tie any one event to that is not the same as doubt about the whole thing."

"Gender is determined by your chromosomes."

"Evolution is the fundamental idea in all of life science, in all of biology. It's like, it's very much analogous to trying to do geology without believing in tectonic plates. You're just not gonna get the right answer. Your whole world is just gonna be — a mystery. Instead of an exciting place."

"To exclude kids in formal education from science is bad for everybody."

"It is this fragile nature of the earth's atmosphere that I want everybody to appreciate. It's what I call your place in space."

"I will assert that U.S. economic growth is in lockstep with science and technology and, by extension, science education."

"I say to the grownups, 'If you want to deny evolution and live in your world that's completely inconsistent with everything we've observed in the universe that's fine. But don't make your kids do it.'"

"If I were the king of the forest, and I’m not, we would have more astronomy."

"People like to grab stuff, hold things in their hands and make things happen. Children’s museums are ideal for these kinds of things. There’s nothing more fun, to me."

"If we found life on Mars, it would change everybody's view of our place in space."

"Spacecraft sent to Mars, Saturn, Mercury, the moon, comets, and asteroids have been making incredible discoveries, with more to come from recent launches to Jupiter, the moon, and Mars. The country needs more of these robotic space exploration missions, not less."

"We need scientifically literate voters and taxpayers for the future."

"How could there be billions of stars more distant than 6,000 years, if the world is only 6,000 years old?"

"If we continue to eschew science ... we are not going to move forward. We will not embrace natural laws. We will not make discoveries. We will not invent and innovate and stay ahead."

"Please, you don't want to raise a generation of science students who don't understand how we know our place in the cosmos, who don't understand natural law."

"Look at the facts. We need you to change things, not deny what's happening."

"What we want to do is not just less, but do more for less. I want the United States to lead the world in this. The more we mess around with this denial, the more we lose.""

""The problem is we have this thin atmosphere and a lot of people trying to breathe it. It's this thinness of the atmosphere that has allowed humankind to accidentally change the climate of the planet."

"I stand by my assertions that although you can know what happens to any individual species that you modify, you cannot be certain what will happen to the ecosystem. Also, we have a strange situation where we have malnourished fat people. It’s not that we need more food. It’s that we need to manage our food system better. So when corporations seek government funding for genetic modification of food sources, I stroke my chin."

"When you compare Mars to Earth, and Venus to Earth, you can see the problem [earthlings face]. We do not want to become Venus."

"It's not cool ... or it's not cool enough. The world is getting warmer, that's all there is to it. I want you guys to stop this. I want you to change the world."

"Nye has won numerous daytime Emmy Awards and has been named outstanding performer in a children's series."

"Nye, who grew up in Washington, D.C., graduated from Cornell University in 1977 with a degree in mechanical engineering. He was lured to the West Coast by Boeing and made an immediate and significant contribution, designing a hydraulic pressure resonance suppressor for their 747s."

"It's his gift. He makes science understandable and fun, and he knows how to connect with people."

"Nye has been instrumental in making science fun for preteen audiences‚ but when he is speaking at a collegiate venue he focuses more on topics he’s serious about."

"He eventually quit his day job as an engineer to focus on comedy writing and performing. The decision led to the creation of 'Bill Nye the Science Guy,' which won 28 Emmys in five years. He also won seven national Emmy Awards for writing, performing and producing."

"A graduate of Cornell University, Nye began his career as an engineer. In fact, Boeing still uses his hydraulic pressure resonance suppressor today."

"Carbon dioxide has never entered the atmosphere so fast. In 1976 the carbon dioxide level was at 0.03 percent. We've lived through a change to 0.04 percent."

"When you have a portion of the population that doesn't believe in (evolution) it holds everybody back, really."

"Nye grew up in a science-minded family in Washington, D.C. His mom was a math and science whiz. His dad manufactured sundials. His grandfather was an organic scientist. Fittingly, one of young Bill’s favorite hangouts was the original Smithsonian National Air and Space Museum, which looked like a small Quonset hut."

"Bill Nye [is] executive director of the Planetary Society, the Pasadena, Calif.-based nonprofit that advocates for space exploration."

"Nye, a Cornell University graduate with a degree in mechanical engineering, studied under the late astronomer Carl Sagan."

"I find both humor and grimness in most issues."

"I don't want people memorizing the planets or counting how many plants there are in the world. But I want them to know that the world is 4.56 billion years old, and I want them to know how we know it is 4.56 billion years old. It's wonderful and exciting, and it creates a reverence for nature. When I see people reject all that, it's kind of creepy."

"I'm an educator. You do what you have to do to get what you are saying across, and if that means being funny, that's what I do."

"I might be trying to change the world, but I also better be funny while I'm doing it. I've never lost sight of that."

"I can be educational, but if I'm not funny and entertaining, too, who's going to come and listen to me or watch me on TV."

"There are major issues that people - as taxpayers and voters - will have to make informed decisions on in the near future. They will need to understand the science and the ethical considerations to form their opinions. Some of these are issues that will affect humanity for decades to come."

"The Earth has never warmed this fast. We need to see how much we can change the world in the next 20 years."

"Global climate change is a big deal to me. We need to change our ways."

"The Earth is just a speck of sand in the universe. And there's no cavalry coming over the hill to rescue it."

"Change the world - even if ever so slightly - is my goal."

"Half the humans are women, so I think half the scientists should be women - a legacy of my parents."

"The single biggest impact a person can have on the Earth is driving a car, either driving a fuel-efficient car or just driving it less."

"It will take more time for the change we have to effect, but we don't have more time. The carbon dioxide on Earth, just in the last four years, has increased from .03 percent to .04 percent. And the change will have a significant impact on everyone."