Senin, 09 April 2018

The Evolution of Sea Turtle

The Evolution of Sea Turtle

Image source: http://www.earthhistory.org.uk/wp-content/Hypothesisedevolutionfromnonturtle.jpg

All of turtle species living in ocean are called sea turtle. It is a kind of peculiar and mysterious migratory marine animal. It is also the largest reptile in marine world. As early as 250 million years ago, the ancestor of sea turtle together with dinosaur experienced a thriving period. Dinosaur has died out, but with its vitality, sea turtle has been living till today.

There are countless mysteries on sea turtle. For example, how can sea turtle escape the disaster on the time period when dinosaur died out? Where does sea turtle migrate? According to evolutionism, in the process of its evolution, its shell is necessary. But paleontologists can't find any evidence on thousands of turtle's fossils. It is speculated that sea turtle has been evolving since more than 20 million years ago. But in the geological formation where they firstly appeared, human couldn't find the serial evolving evident for the shell of sea turtle.

Recently, Cuba Scientists found the mark which was left by a huge meteorite colliding with the earth. It reconfirmed the theory about a huge meteorite that caused the extinction of dinosaur. About 70 million years ago, a huge meteorite collided with the earth in Mexican area, forming a huge hole in the earth. According to the research, at that time, an asteroid that has a diameter of 7-10 kilometers collides with the earth, which caused a huge blast. At first, the temperature on the earth rose dramatically. Then a large numbers of dusts were flung into the air, covering the sun and the sky. Thus the photosynthesis of plants intermitted, which caused the death of all of dinosaurs. The wallop of this collision equals to exploding 5 billion atom bombs at the same time. After this disaster, the bushy dusts and vitriol cloud entered the aerosphere and covered the whole earth, making the sunshine couldn't directly reach the earth. Therefore it caused the extinction of many species on the earth.

So how can sea turtle escape from this disaster? Some scientists wrote in their papers, "Marine animals have been living in sea. They can even dive into a deep sea where the change of environment was comparatively small. Therefore they have enough time to adapt to the change of the environment." Especially, sea turtle has very strong diving ability, so that it can magically survive the disaster.

Some Australian scientists recently found some ancient sea turtle's fossils dating back 110 million years ago. With the help of these fossils, the scientists can explain the reason that sea turtle have not changed a lot in this very long time. Scientists hoped to decrypt the "code" that sea turtle disputed their evolution.

These fossils were found in the northeast part of Australia in recent years. Paleontology Ben Karl said, "It doesn't look much difference between the fossils and today's sea turtles. In the long evolution process, for survival and adapting to environment, some animals have changed a lot. But it seems form the beginning that sea turtle was the winner of the evolution battle. If you think that ancient marine animals have not existed, then you should come to see these sea turtles."

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