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Most people think of dinosaurs as big ferocious and extinct reptiles.
That 39 s largely true but there are some misconceptions.
Dinosaurs came in all shapes and sizes.
Dinosaurs were the largest land animals of all time but a great number of dinosaurs were smaller than a turkey.
Dinosaurs first appeared about 230 million years ago.
They ruled the earth for about 135 million years until an extinction event 65 million years ago wiped out all but bird like dinosaurs.
Scientists don 39 t agree entirely on what happened but the extinction likely was a double or triple whammy involving an asteroid impact choking chemicals from erupting volcanoes climate change and possibly other factors.
Many people think extinct flying reptiles called pterosaurs were dinosaurs.
They were dinosaurs 39 closest relatives but technically not dinosaurs.
Pterosaurs had hollow bones relatively large brains and eyes and of course the flaps of skin extending along their arms which were attached to the digits on their front hands.
The family includes with elaborate bony head crests and lack of teeth.
Pterosaurs survived up until the mass die off 65 million years ago when they were went the way of the dodo along with marine reptiles and other dinosaurs.
Dinosaur fossils were first recognized in the 19th century.
In 1842 paleontologist richard owen coined the term dinosaur derived from the greek deinos meaning terrible or fearfully great and sauros meaning lizard or reptile.
Quot the dinosaur could not have lived for ever.
No creatures no plants no tiny bacteria are forever not even homo sapiens.
Extinction is th