SN Online SN Online Highlights from recent online-only stories Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Science News April 22, 2011 at 10:37 am ATOM & COSMOSReflected heat may explain the strange slowdown of two spacecraft. Read “Pioneer puzzle pinned on thermodynamics.” DELETED SCENES BLOGAfter 30 years, the space shuttle fleet comes to rest. See “NASA picks shuttles’ retirement homes” to find out where. BODY & BRAINFat breakdown by friendly bacteria may lead to unfriendly buildup in the arteries. Read “Gut microbes may foster heart disease.” HUMANSGene variants may make some kids more sensitive to good and bad parenting. See “Genetic roots of ‘orchid’ children.”