The word "dinosaur" tends to evoke giant animals with massive bodies, long necks and tails, and tiny heads. These "quintessential dinosaurs" actually represent one prominent subgroup of he Dinosauria, the so called Sauropoda ("long-necked dinosaurs" in popular culture). Sauropods were truly amazing animals, and included the largest land-living animals known, with body lengths of up to 40 meters and weights of 70 tons or more.