Trilobites: Being Antisocial Leads to a Longer Life. For Marmots. Unlike most mammals, yellow-bellied marmots with more active social lives died younger than those that kept to themselves, scientists found after tracking them for 13 years. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:As Measles Surges, ‘Decades of Progress’ Are in JeopardyTrump’s ‘Energy Dominance’ Doctrine Is Undermined by Climate ChangeRough Drafts of Richard Feynman’s Ideas Head to AuctionMeteorite warning: ASTONISHING moment blue FIREBALL rips through skyFur Trapper Kills Grizzly Bear After His Wife and Baby Were Mauled in the YukonDr. Gerald Berenson, 96, Dies; Traced Heart Disease to Childhood