| October 4, 2002 | ||
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THE BIRTH OF THE UNIVERSE The universe, they calculated, is 13.89 billion years old, plus or minus half a billion years. Only 4.8 percent of it is made of ordinary matter. Matter of all types, known and unknown, luminous and dark, accounts for just 27.5 percent. The rest of creation, 72.5 percent, is the mysterious dark energy, they reported in a paper submitted last month to The Monthly Notices of the Royal Astronomical Society. |
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