Evolution: Age of the Dinosaur

The Mesozoic Era lasted from 248-65 million years ago, this covered the Triassic, Jurassic and Cretaceous periods of earth’s evolution.

Around 248 million years ago, earth witnessed the dying out of much of its marine animals.  This extinction opened the door for the rise of the dinosaur.

The Triassic Period took place from 248 to 206 million years ago, but it was not until 220 million years ago, that planet earth witnessed the appearance of mammals and dinosaurs, and their evolution spread over the Jurassic and Cretaceous periods, lasting some 165 million years.

The earliest dinosaurs we know of, has to be the two-legged meat eaters; Raptor and Plateosaurus the four-legged plant eater.

As the Triassic Period came to an end, planet earth suffered many volcanic eruptions, which led to the extinction of many dinosaurs, which in turn made way for larger and more deadly one’s to take their place.

The Jurassic Period lasted from 206 to 144 million years ago, and long-necked dinosaurs started appearing.  However, around 190 – 183 million years ago earth witnessed the extinction of some 80% of marine life and shallow water species die out.

The climate of the Jurassic Period was hot and dry, which brought about new dinosaurs:

APATOSAURUS, also known as BRONTOSAURUS, a large slow-moving herbivore, with thick legs, tiny head, with a long neck and tail.

DIPLODOCUS, a long-necked herbivore, whiplash tail, hollow bones and a tiny head.

BRACHIOSAURUS, a tree-top grazing dinosaur, with a long neck, large front limbs and a small head.

The Jurassic Period is remembered as the dinosaur era.  They walked upright, and as such developed different body shapes based on the environment.  By the end of the Jurassic Period, dinosaurs had spread across this land of ours.

The CRETACEOUS Period lasted from 130 to 66 million years ago and the final part of the Mesozoic Era… “Age of the Dinosaur.”  During this time of evolution, mammals flourished, plants and trees evolved, landscapes changed.  High levels of tectonic activity took place, which was accompanied by volcanic activity.

By the end of this period, outlines of continents had formed, many new mountain ranges had been created, sea levels had risen, covering around one-third of earth’s land.

Dinosaurs dominated this land of ours, and by the end of the Cretaceous period, at least seventy had become extinct.

Historical evidence states that around 65 million years ago, planet earth collided with an asteroid, and as such would have sent much dust into the atmosphere, which would have blocked out the sun for many months or years.  Without the sun our planet would have died out, and animal life would have ceased to survive…