Is dark matter composed of sterile neutrinos?

“If you ask the question, ‘What is the content of the universe?’ the answer is not so simple,” says Mikhail Shaposhnikov, a scientist associated with the École Polytechnique Fédérale de Lausanne and CERN, both in Switzerland. Shaposhnikov explains to PhysOrg.com that only seven or eight percent of the universe is composed of what we term “regular” matter.

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<p><a href="http://www.physorg.com/news88086032.html">Is dark matter composed of sterile neutrinos?</a></p> <p>“If you ask the question, ‘What is the content of the universe?’ the answer is not so simple,” says Mikhail Shaposhnikov, a scientist associated with the École Polytechnique Fédérale de Lausanne and CERN, both in Switzerland. Shaposhnikov explains to <i>PhysOrg.com</i> that only seven or eight percent of the universe is composed of what we term “regular” matter.</p>