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| | NOVA | The Elegant Universe | Watch the Program | PBS |
 | | As Einstein struggled to unite the weak force of gravity with the much stronger force of electromagnetism, physics moved on, examining the bizarre way tiny bits of matter interact with one another inside the atom. |
 | | Meanwhile, mainstream science was embracing particles as points, not strings, and the Standard Model was born, uniting the strong force, the weak force, and electromagnetism. |
 | | By the mid-1980s physicists had developed five different versions of string theory, raising the question of whether it would prove to be a theory of everything or a theory of nothing. |
| www.pbs.org /wgbh/nova/elegant/program.html (715 words) |
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