Species Evolution Human Evolution Dinosaur Evolution Animal Evolution Plant Evolution Species Development Mass Extinction Events Dinosaurs Cretaceous Period Co-evolution Anthropology Extinction Events Darwinism Cetacean Evolution Species Extinction Primate Evolution Evolutionary Biology Marine Reptiles Reptilian Evolution Anatomy Pterosaur Evolution Microbial Evolution Arachnid Evolution Amphibians Insect Evolution Transition from Sea to Land Mammal Evolution Animal Behavior Marine Mammal Evolution Arthropods Marine Evolution Human Ancestry Charles Darwin Species Divergence Human Ancestors Species Origins Bird Evolution Ancient Species Marine Biology Ancestry Marine Life Triassic Period Great Oxidation Event Amniotes Cambrian Explosion Domestication Miocene Epoch Origin of Life
Exceptionally preserved vertebrae with growth rings let researchers gauge its size, supporting a much earlier origin for ocean-going giants.
