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A comparison of spinosauridae, a group of fish-eating theropods that flourished during the Cretaceous Period.
(Photo Saurian)
Kutchicetus minimus was an early whale from the Eocene, & at 2.5m long, it was probably the smallest cetacean of its time. It was semi-aquatic, like an otter.
(Credit Roman Uchytel)
Sharovipteryxe hunted insects & lived in the forests of what is now Central Asia. They had a large gliding membrane on the back legs!
(Credit Adik009)
Rhynchotherium was a bizarre looking elephant that lived in North America during the Miocene & Pliocene.
(Credit Margret Flinsch)
Zhuchengtyrannus magnus is the second-largest tyrannosaur ever found, after the T. rex.
(Credit Fine Art America)
Nuralagus rex was an enormous rabbit that lived on the island of Minorca 5 million years ago.
Waimanu manneringi was a early species if penguin that live around 60 million years ago. Discovered in New Zealand, the name Waimanu comes from Maori for 'waterbird'.
(Credit Chris Gaskin)
Ornithocheirus is an extinct pterosaur from the mid-Cretaceous. Its remains have been found in the UK.
(Credit Rebecca Groom)
Sanctacaris was a marine arthropod from the middle Cambrian. It grew to almost a metre long.
(Credit shikhar09)
Kerygmachela is an early arthropod that lived during the Cambrian period. They had 11 pairs of lateral lobes for swimming.
(Credit deviantart/Achaeopteryx)