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Almost 30 percent of the total matter-energy budget is said to be composed of so-called cold dark matter and almost 70 percent of "dark energy," leaving only about 4 percent as visible matter in the form of the atoms that make up the stars, planets, interstellar dust, and ourselves. Such is the degree of discrepancy between theory and observations today.
--
Prologue, The Elusive Planet Vulcan, A Parable, p. 5

 

John Moffat (physicist)

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"There are plenty of things that are unknown, but are assumed reasonably to exist, even in the most basic sciences. Maybe 90 percent of the mass-energy in the universe is called “dark,” because nobody knows what it is."

 

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Of all the book's references, a full 27 percent precede 1900. Another 44 percent fall between 1900 and 1950 (60 percent of those are before 1925); and only 29 percent are more recent than 1950. From the total literature spanning more than a century, the few "bad apples" have been hand-picked most aptly to serve Gould's purpose.

 

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Barack Obama