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" No one intuitively understands quantum mechanics because all of our experience involves a world of classical phenomena where, for example, a baseball thrown from pitcher to catcher seems to take just one path, the one described by Newton's laws of motion. Yet at a microscopic level, the universe behaves quite differently. "

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" When considering real-world issues, particularly those that touch on science and technology, it is harder to speak in platitudes or rely purely on emotion or fear. Substance, or its lack, becomes harder to mimic or mask, which is why I wish we had a true televised presidential debate on these subjects. "

Lawrence M. Krauss

Fear

Science

Speak

" Nothing can create something all the time due to the laws of quantum mechanics, and it's - it's fascinatingly interesting. "

" Parents, of course, have concerns and 'say,' but they don't have the right to shield their children from knowledge. That is not a right, any more than they have the right to shield their children from healthcare or medicine. "

" When it comes to the real operational issues that govern our understanding of physical reality, ontological definitions of classical philosophers are, in my opinion, sterile. "

" Richard Nixon, famously, conducted his foreign policy according to the 'madman theory': he tried to convince enemy leaders that he was irrational and volatile in an attempt to intimidate them. But this was a potentially useful approach to foreign policy only because it was an act. "

" If innovations were predictable, they wouldn't be discoveries. "

" Immediately after the San Bernardino shooting, when it was unclear whether Syed Rizwan Farook and Tashfeen Malik were motivated by a terroristic ideology, the focus of the conversation was on gun laws. "

" The illusion of purpose and design is perhaps the most pervasive illusion about nature that science has to confront on a daily basis. "

" Neutrinos alone, among all the known particles, have ethereal properties that are striking and romantic enough both to have inspired a poem by John Updike and to have sent teams of scientists deep underground for 50 years to build huge science-fiction-like contraptions to unravel their mysteries. "

" Aside from communications satellites, space is devoid of industry. "

" We should teach kids how to question. Now having said that, of course, to be a productive adult, there are certain skills that are required - reading, writing, and, in the old-fashioned days, we used to say arithmetic. Now we say mathematics. "

" Education is far less about a set of facts than a way of thinking, than learning how to critically think. And therefore, what I always think should be the basis of education is not answers but questions. "

" A significant fraction of evangelical voters appear more likely to ignore the candidates' specific economic and foreign policy platforms in favor of concerns about gay marriage or abortion. "

" The biggest conceptual change over the last 100 years in the way physicists think about the world is symmetry. "

" When a person's religious beliefs cause him to deny the evidence of science, or for whom public policy morphs into a battle with the devil, shouldn't that be a subject for discussion and debate? "

" For the record: Quantum mechanics does not deny the existence of objective reality. Nor does it imply that mere thoughts can change external events. Effects still require causes, so if you want to change the universe, you need to act on it. "

" It is, after all, impossible in the modern world to shield everyone from nonsense and stupidity. "

" Science is only truly consistent with an atheistic worldview with regards to the claimed miracles of the gods of Judaism, Christianity and Islam. "

" Religious leaders need to be held accountable for their ideas. "

" Symmetries are the playing field on which the physical world works and which determine the rules of the game. The symmetries of nature determine for us things that remain constant, that can't be changed. Those are the guideposts in physics, the quantities like energy and momentum. "

Lawrence M. Krauss

Energy

Game

" I can't prove that God doesn't exist, but I'd much rather live in a universe without one. "

" For all of his bravado, obnoxiousness, hatred, and vitriol, the scariest thing about Trump, to me, is his unique combination of ignorance about the world, convolved with ignorance about himself. "

Lawrence M. Krauss

Hatred

Ignorance

" Philosophy used to be a field that had content, but then 'natural philosophy' became physics, and physics has only continued to make inroads. Every time there's a leap in physics, it encroaches on these areas that philosophers have carefully sequestered away to themselves, and so then you have this natural resentment on the part of philosophers. "

" For a man with an impressive educational C.V., Ben Carson makes a lot of intellectual missteps. "

" When it comes to the things that people really want in science fiction - like space travel - the simplest things end up causing them not to happen. Humans are 100-pound bags of water, built to live on Earth. "

" I am in favor of saying, 'Okay, let's get teams of educators and experts in certain disciplines to say, 'What are the basic things that we think are an essential part of an early education for people?'' Put them together and create, as well as possible, a set of goals and tools to learn those things. "

" By no definition of any modern scientist is intelligent design science, and it's a waste of our students' time to subject them to it. "

" The Bible is full of dubious scientific impossibilities, from Jonah living inside a whale, to the sun standing still in the sky for Joshua. "

" One might rationally argue that individual human beings should be free choose what moral behavior they approve of, and which they don't, subject to the constraints of the law. "

" Teaching and writing, to me, is really just seduction; you go to where people are and you find something that they're interested in and you try and use that to convince them that they should be interested in what you have to say. "