Dark Matter 'Hairs' May Surround Earth

Earth may sport a thick coat of superlong dark matter "hairs," a new study suggests. "A stream can be much larger than the solar system itself, and there are many different streams crisscrossing our galactic neighborhood," study author Gary Prézeau, of NASA's Jet Propulsion Laboratory in Pasadena, California, said in a statement. Prézeau performed computer simulations that looked at what happens when such streams go through Earth and other planets in the solar system.