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"You have that one basic string, but it can vibrate in many ways. But we're trying to get a lot of particles because experimental physicists have discovered a lot of particles."
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"I'm like a child trying to do everything, say everything and be everything all at once."
"I'm not trying necessarily to become a movie star; that wouldn't be bad but that's not the aim. I'm just trying to do interesting things and go into areas where I've not been before."
"I'm trying to keep a level head. You have to be careful out in the world. It's so easy to get turned."
"I checked out all types of tobacco trying to find one that would be easiest to live with, I ended up using pipe tobacco. It burned slower, and it wasn't as harsh on my throat... It also smelled better."
"I'm not trying to be sexy. It's just my way of expressing myself when I move around."
"We're not trying to top ourselves with each record, obviously."
"James Joyce was a synthesizer, trying to bring in as much as he could. I am an analyzer, trying to leave out as much as I can."
"I'd been trying for all of the eight years we'd been married to have a child, and finally I did."
Explore more quotes by Edward Witten
"Technically you need the extra dimensions. At first people didn't like them too much, but they've got a big benefit, which is that the ability of string theory to describe all the elementary particles and their forces along with gravity depends on using the extra dimensions."
"If I take the theory as we have it now, literally, I would conclude that extra dimensions really exist. They're part of nature. We don't really know how big they are yet, but we hope to explore that in various ways."
"Even before string theory, especially as physics developed in the 20th century, it turned out that the equations that really work in describing nature with the most generality and the greatest simplicity are very elegant and subtle."
"Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle."
"As for the forces, electromagnetism and gravity we experience in everyday life. But the weak and strong forces are beyond our ordinary experience. So in physics, lots of the basic building blocks take 20th- or perhaps 21st-century equipment to explore."
"So when you ask me how string theory might be tested, I can tell you what's likely to happen at accelerators or some parts of the theory that are likely to be tested."
"There was a long history of speculation that in quantum gravity, unlike Einstein's classical theory, it might be possible for the topology of spacetime to change."
"The theory has to be interpreted that extra dimensions beyond the ordinary four dimensions the three spatial dimensions plus time are sufficiently small that they haven't been observed yet."
"As of now, string theorists have no explanation of why there are three large dimensions as well as time, and the other dimensions are microscopic. Proposals about that have been all over the map."
"In Einstein's general relativity the structure of space can change but not its topology. Topology is the property of something that doesn't change when you bend it or stretch it as long as you don't break anything."
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