The exact reasons for their extinction are not completely clear

Approximate measurements of the Oviraptor:

They lived during the Permian period

Longitud 286 mm

Ichthyosaurus spent its entire life in the water

Therizinosaurus secodontosaurus The exact reasons for theirTherizinosaurus (T. cheloniformis `Scythe Lizard) is a genus of theropod dinosaur that lived in the Campanian of the Late Cretaceous, approximately 70 75 million years ago, in what is now Asia. It was characterized for being a large and herbivorous animal, with long legs and a long, thin neck that allowed it to reach leaves and branches of tall trees. Therizinosaurus was a very large animal, with a total length of up to 10 meters and a height of