Phys. Rev. Focus28, 8 (2011) – Published August 19, 2011
Analysis of newly retrieved navigational data for the Pioneer 10 and 11 spacecraft suggests that an anomalous acceleration in their motion is steadily decreasing, pointing to asymmetric radiation of heat as the likely cause, rather than the more exotic explanations previously proposed
A report from the PAMELA satellite says the electron flux in cosmic rays is consistent with the existence of new sources, such as dark matter particles or other astrophysical phenomena, but the results are still inconclusive.