▁long . ▁According ▁to ▁recent ▁computer ▁simulations , ▁they ▁may ▁not ▁have ▁been ▁able ▁to ▁lift ▁their ▁ne cks ▁like ▁other ▁sau rop ods . ▁However , ▁these ▁simulations ▁do ▁not ▁take ▁verte br al ▁cart il age ▁into ▁account , ▁which ▁would ▁likely ▁allow ▁a ▁greater ▁range ▁of ▁motion . ▁Instead ▁of ▁reaching ▁up ▁into ▁trees , ▁they ▁may ▁have ▁used ▁their ▁ne cks ▁to ▁gra ze ▁over ▁a ▁broad ▁area . ▁They ▁may ▁also ▁have ▁used ▁their ▁ne cks ▁to ▁reach ▁into ▁dense ▁stands ▁of ▁con if ers , ▁or ▁over ▁mar sh y ▁ground . ▁ ▁Their ▁heads , ▁like ▁those ▁of ▁other ▁sau rop ods , ▁were ▁tiny ▁with ▁the ▁nas al ▁open ings ▁on ▁the ▁top ▁of ▁the ▁head ▁( though ▁in ▁life ▁the ▁nost r ils ▁themselves ▁would ▁have ▁been ▁close ▁to ▁the ▁tip ▁of ▁the ▁sn out ). ▁ ▁The ▁heads ▁of ▁di pl od oc ids ▁have ▁been ▁widely ▁dep icted ▁with ▁the ▁nost r ils ▁on ▁top ▁due ▁to ▁the ▁position ▁of ▁the ▁nas al ▁open ings ▁at ▁the ▁a pe x ▁of ▁the ▁sk ull . ▁There ▁has ▁been ▁spec ulation ▁over ▁whether ▁such ▁a ▁configuration ▁meant ▁that ▁di pl od oc ids ▁may ▁have ▁had ▁a ▁tr unk . ▁A ▁ 2 0 0 6 ▁study ▁sur m ised ▁there ▁was ▁no ▁pale one uro an atom ical ▁evidence ▁for ▁a ▁tr unk . ▁It ▁noted ▁that ▁the ▁fa cial ▁n erve ▁in ▁an ▁animal ▁with ▁a ▁tr unk , ▁such ▁as