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The complete history of the Universe -- from the Big Bang to 200 my into the future

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History of the Universe eBook. 398 pages, 300 illustrations only $2.99

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Tau

A particle similar to the electron but with a mass approximately 3,500 times larger.

Because it is so heavy the tau is unstable and decays quickly via the weak interaction into other particles.

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History of the Universe eBook. 398 pages, 300 illustrations only $2.99

eBook only $2.99
398 pages, 300 images

"I find the science fabulous...an extremely useful teaching tool."
Professor David Christian

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