The dinosaurs evolved from reptiles called the archosaurs, which were also the ancestors of modern crocodiles. But unlike the sprawling crocodiles, dinosaurs walked on upright legs, which is more efficient. Some were probably warm-blooded, with insulating feathers. They all lived on land and laid eggs.
Dinosaur names are bullit up from parts of mainly Greek words, with some latin.
The word “dinosaur” itself comes from the Greek deinos, meaning “terrible”, and sauros meaning “lizard” or “reptile”. So it means “terrible reptile”.
More of these words are listed below, with their meanings.
MEANINGS NAMES MEANINGS NAMES huge Mega helmet Corytho ridge, crest Lopho pretty Compso slender Lepto hollow Coelo high Hypsi hand Cheirus different Hetero hormed Cera light Elaphro tundher Bronto spiny Echino short Brachy beam Docus arm Brachio double Diplo high Alti two Di strange Allo skin Derm top Acro
MEANINGS NAMES MEANINGS NAMES fast Veloci four Quadri tyrant Tyranno winged Ptero three Tri many Poly Head, face Tops foot Pod, pus, pes beast Thero flat Plateo roofed Stego body Physis Lizard, reptile Saurus thick Pachy jumping Salto eye Ophthalmo nose Rhino tooth Odon(t) thief Raptor small Micro
The Palaeozoic era ended with a mass extinction that seems to have wiped out 70 per cent of life on Earth.
It took the Triassic world about 10 million years to recover from the catastrophe, and by that time the surviving reptiles were evolving into new forms.
They included the therapsids, mammal-like reptiles that gave rise to the first true mammals at the end of the Triassic.
They also included marine reptiles, such as the nothosaurs, and ichthyosaurs, the first of the flying pterosaurs, and- appearing some 230 million years ago- the earliest dinosaurs.
The Jurassic period was a time of climate change, brought about by the breakup of the huge, dry supercontinent Pangaea into two smaller landmasses, and the creation of many shallow seas.
Global temperatures were still warm because there were no polar ice sheets, but there was more rainfall.
Desert areas shrank as a result, and much of the world became luxuriant forest.
These changes clearly suited the dinosaurs, which diversified into a wide variety of species. But the mammal-like reptiles became extinct, and their mammal descendants remained insignificant for the next 140 million years.
The warm, damp climates that had developed in the Jurassic continued into the Cretaceous Period, but there were changes in plants that led to chnges in major herbivore groups.
Some groups like the giant sauropods became less prominent, but many others flourished until the mass extinction at the end of the era.
Meanwhile, the supercontinents of Laurasia and Gondwana were breaking up, and very high sea levels flooded many continental areas that are now dry land