Physicists used light from stars to perform a cosmic Bell test, which verified that quantum particles were indeed “spooky,” Emily Conover reported in “Quantum effect passes space test” (SN: 1/21/17, p. 12).
Reader George Mitchell took issue with Conover’s description of entangled photons before they are measured as having multiple polarizations at once.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.