Δευτέρα 3 Ιουνίου 2013

EVOLUTION OF FLYING REPTILES

EVOLUTION OF FLYING REPTILES

-230mya[million years ago]:At this time some lizards want to catch their food,flies.But this lizards will fly after thousands of generations will be a group of reptiles called pterosaurs [flying lizards].We can see the brigde between pterosaurs and lizards in an animal today,the Draco.It too eat flies it had to fly.So it thrashing a small mattress of skin and live the ground he can’t fly but glide,the key of our story was lived 30my later in a very tropic world.-200mya:It’s named Dimofodon,it glides to catch insects and be safe from the early dinosaurs down that going to demeaned the world.-150mya:In China lives a monster,Darwinopterus.It’s a pterosaur that didn’t ate just insects,but small dinosaurs with it’s size.They evolved the winds but with a cost.They can’t walk quick on the ground in 4 legs,so they had to change the shape of their body.-140mya:All the pterosaurs before this time had long tales but now they became much shorter to walk better in the ground.-80mya:At that time the pterosaurs with short tales demeaned the skies,one species that ate fish is the most demeaned and big is Pteranodon,6m wingspan.But how so giant creatures can fly?The answer is on a fossil Pteranodon bone,it’s hollow.Birds and pterosaurs lay eggs but the pterosaurs born with the ability to fly,and this help some some creatures to get gigantic.-65.5mya:With 5 times better saw,a wingspan of 15m and a weight of just 2 humans Quetzalcoatlus is the largest creature ever to flew.They fed in flesh of dead dinosaurs and had hollow bones to fly.During the late Cretaceous period was lived in Mexico.But after so much success they vanished by the asteroid strike that vanished dinosaurs,aquatic and flying reptiles,including, Pterosaurs.

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