A Brief History of Time

A Brief History of Time

A relatively modern theory, the idea is that particles are not dots in space-time but rather waves of infinitely long, one-dimensional lengths, like strings. These strings can join together and separate but require the existence of 10 or 26 dimensions for the theory to work.
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String theory Term Timeline in A Brief History of Time

The timeline below shows where the term String theory appears in A Brief History of Time. The colored dots and icons indicate which themes are associated with that appearance.
Chapter 11
Human Curiosity and Ingenuity Theme Icon
...were not a dot, but very thin lengths with one dimension. They could be open strings with ends or closed strings, like loops. Particles are in one place at one time,... (full context)
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The Danger of Stubbornness  Theme Icon
Two strings can join, either at the ends for open strings or to create a larger circle... (full context)
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...in the atom were waves on a string, and the nuclear forces between them were strings that formed a web. These strings would have their own tension of about 10 tons. (full context)
The Search for a Unifying Theory of the Universe Theme Icon
Human Curiosity and Ingenuity Theme Icon
The Danger of Stubbornness  Theme Icon
In the 1970s Joel Scherk and John Schwarz said string theory could describe gravity, but only if the tension were significantly higher. This would leave most... (full context)
Human Curiosity and Ingenuity Theme Icon
The Danger of Stubbornness  Theme Icon
...garnered attention. Soon, a new version of the theory, called the heterotic string, arose. These strings could eliminate all infinities, although this is not yet proven. But the biggest problem with... (full context)
Human Curiosity and Ingenuity Theme Icon
...one-dimensional—just a line. Closer up you can identify many more points on the straw. In string theory , looking on a very small scale reveals ten dimensions. No room for space ships,... (full context)
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...life is only possible in space-times with the four flat dimensions we are used to. String theory allows some regions of the universe to have the same properties as ours, while in... (full context)
The Search for a Unifying Theory of the Universe Theme Icon
Human Curiosity and Ingenuity Theme Icon
...p-branes, which take up two or more dimensions in space, while particles are 0-brane and strings are 1-brane. Supergravity, string, and p-brane theories could all be estimations of one overarching theory,... (full context)
Chapter 12
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...it is an infinite tower of tortoises with the flat earth on their back, or string theory . Although the latter is more precise mathematically, it lacks observational evidence just as much... (full context)