Leadership is about vision and responsibility, not power.

Leadership is about vision and responsibility, not power. And I try to model that in all of my interactions.

For just a few dollars a dose, vaccines save lives and help reduce poverty. Unlike medical treatment, they provide a lifetime of protection from deadly and debilitating disease. They are safe and effective. They cut healthcare and treatment costs, reduce the number of hospital visits, and ensure healthier children, families and communities.

We know that children who are healthier do not require medical treatment or care, both of which cost time and money. So, by avoiding illness, infants have a greater chance of growing into healthier children who are able to attend school and become more productive members of society.

More people living in less space can put greater strain on already limited sanitation resources, and this can create a fertile breeding ground for waterborne infectious disease and the insects spreading them.

Fudging the data in any way whatsoever is quite literally a sin against the holy ghost of science. I'm not religious, but I put it that way because I feel so strongly. It's the one thing you do not ever do. You've got to have standards.

There aren't just bad people that commit genocide; we are all capable of it. It's our evolutionary history.

There is little evidence that our individual intelligence has improved through recorded history.

We'd never have got a chance to go outside and look at the earth if it hadn't been for space exploration and NASA.

NASA will send up a big sun shade that will be in orbit between the earth and sun and deflect 2 or 3 percent of the sunshine back into space. It would be cheaper than the international space station.

If it hadn't been for the Cold War, neither Russia nor America would have been sending people into space.

If we gave up eating beef we would have roughly 20 to 30 times more land for food than we have now.

China will soon emit more greenhouse gases than America, but its regime knows if it caps aspirations there will be a revolution.

I also think we need to maintain distinctions - the doctrine of creation is different from a scientific cosmology, and we should resist the temptation, which sometimes scientists give in to, to try to assimilate the concepts of theology to the concepts of science.

Science cannot tell theology how to construct a doctrine of creation, but you can't construct a doctrine of creation without taking account of the age of the universe and the evolutionary character of cosmic history.

Chance doesn't mean meaningless randomness, but historical contingency. This happens rather than that, and that's the way that novelty, new things, come about.

Polygraph tests are 20th-century witchcraft.

I think the perception of there being a deep gulf between science and the humanities is false.

Gender consciousness has become involved in almost every intellectual field: history, literature, science, anthropology. There's been an extraordinary advance.

We need to think more about the nature of rhetoric in anthropology. There isn't a body of knowledge and thought to fall back on in this regard.

I am glad to have this opportunity of expressing my high appreciation of the honour extended to me many years ago by the Royal Swedish Academy of Science by enrolling me amongst its members.

Thanks to the high standing which science has for so long attain and to the impartiality of the Nobel Prize Committee, the Nobel Prize for Physics is rightly considered everywhere as the highest reward within the reach of workers in Natural Philosophy.

Every day sees humanity more victorious in the struggle with space and time.

It is a shock to us in the twentieth century to discover, from observations science has made, that the fundamental mechanisms of life cannot be ascribed to natural selection, and therefore were designed. But we must deal with our shock as best we can and go on.

Science is not a game in which arbitrary rules are used to decide what explanations are to be permitted.

The theory of undirected evolution is already dead, but the work of science continues.

It was a shock to people of the nineteenth century when they discovered, from observations science had made, that many features of the biological world could be ascribed to the elegant principle of natural selection.

I told my father I had to try political science for a year. He thought I was throwing my life away.

I would not hesitate to say I was addicted to the Internet in the first two years. It can be addictive, and things not taken in moderation have negative effects. But the alarmism around 'Facebook is changing our brains' strikes me as a kind of historical trick. Because we now know from brain science that everything changes our brains.

The tools that a society uses to create and maintain itself are as central to human life as a hive is to bee life. Though the hive is not part of any individual bee, it is part of the colony, both shaped by and shaping the lives of its inhabitants.

There is no larger collective-action problem than the environment. The three biggest lies of the environmental movement is that every little bit helps, you can do your part, and together we can do it.

I think computer science, by and large, is still stuck in the Modern age.

Doing linear scans over an associative array is like trying to club someone to death with a loaded Uzi.

Real programmers can write assembly code in any language.

I want people to use Perl. I want to be a positive ingredient of the world and make my American history. So, whatever it takes to give away my software and get it used, that's great.

For me, writing is a love-hate relationship.

When I announced the development of Perl 6, I said it was going to be a community design. I designed Perl, myself. It's limited by my own brain power. So I wanted Perl 6 to be a community design.

The ultimate aim of all science to penetrate the unknown. Do you realize we know less about the earth we live on than about the stars and the galaxies of outer space? The greatest mystery is right here, right under our feet.

Don't you see what's at stake here? The ultimate aim of all science to penetrate the unknown. Do you realize we know less about the earth we live on than about the stars and the galaxies of outer space? The greatest mystery is right here, right under our feet.

I grew up reading thrillers, science fiction, fantasy - you name it - and one day I asked myself if there was a reason why a fear of spiders was so common. Was there something buried deep in our evolutionary history that made being scared of spiders a survival instinct?

My daughters are both funny and smart and lots of fun. They play lacrosse, soccer, musical instruments, like to cook with me, and are naturals in the swimming pool. Honestly, though, what I like doing most with them is eating. I've worked really hard to make sure they are willing to try all sorts of different foods.

My friends have said, 'Wait, you're pretty, and you sing? What do you mean you're interested in science?' I have to just hold my head and go, 'Do you hear yourself?' By no means should you ever limit yourself because of what others think or because of their perceptions of what someone looks like in a certain field.

My mom keeps me grounded and all that. She makes me do chores.

I wish that I was one of those kids who grew up saying I always wanted to be an astronaut and was really good at science and math. But that wasn't really the case. I always liked it, but I never believed I was one of the smart kids.

Representation is so important because it's hard for kids to want to be what they can't see. Little girls and boys need to know that it's natural for girls to love science and tech.

Because of technologies from space exploration, we can begin to understand our world's origins, and our lives are improving. These are the reasons why dedicating a life to the sciences and space exploration is so meaningful and rewarding.

Science is objective. And in my view we cannot take any experimental results seriously except in the light of good explanations of them.

Quantum computation is... a distinctively new way of harnessing nature... It will be the first technology that allows useful tasks to be performed in collaboration between parallel universes.

I myself believe that there will one day be time travel because when we find that something isn't forbidden by the over-arching laws of physics we usually eventually find a technological way of doing it.

Time travel may be achieved one day, or it may not. But if it is, it should not require any fundamental change in world-view, at least for those who broadly share the world view I am presenting in this book.