Prevailing wisdom has it that these leviathans used their necks like giraffes today.They reached up high into the trees, munching leisurely on forest canopy that was out of reach for rival herbivores.

• 人们普遍认为这些庞然大物就象现在的长颈鹿一样利用它们颈长的优势,高高地把头伸向树梢,悠闲自在地咯吱咯吱地咀嚼别的食草类动物无法能及的树冠上的嫩枝和叶子。