SN Online SN Online Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Science News March 7, 2013 at 2:48 pm EARTH IN ACTION Alexandra Witze ponders Earth’s odds in “When an asteroid heads for Earth, it’s time to reconsider those doomsday plans.” Alessandro Cumbo and Martin Oeggerli MOLECULES Nanoparticles (below, blue) detect viruses (pink) in “Synthetic nanomaterial can recognize viruses.” HEALTH & ILLNESSAllergic people became able to tolerate up to a full glass of milk. See “Therapy for milk allergy offers hope, and caution.” Pregnant women taking an omega-3 fatty acid have bigger babies. Read “ Fish oil component boosts newborn health .”