... One promising puzzle piece for confirming dark matter now seems unlikely fit . ... Researchers with the Kavli Institute for Particle Astrophysics and Cosmology (KIPAC) at Stanford University in Palo Alto, California, are confirming the previous detection, and the excess seems to grow at higher energies in the spectrum, which is consistent with many theories about how dark matter might produce positrons. ... Only registered members of Astronomy.com are allowed to comment on this article. ...