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Could the elusive neutrino particle be a component of dark energy?

Richard Vaun, Holley, New York
April 2009 WE pie chart wmap
Normal or "baryonic" matter (atoms) makes up about 4.6 percent of the present universe. The rest consists of about 23 percent dark matter and 72 percent dark energy.
WMAP Science Team
A particle (whether a neutrino or something else) cannot supply negative pressure, so the answer is "no." So while not a component of dark energy, neutrinos may be somehow related to its existence.

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