How The Dinosaurs Became By The Extinct-asteroid Theory?

The asteroid theory states that nearly sixty five million years ago, an asteroid crashed into the earth, which was the cause of the extinction of dinosaurs. This theory was found eligible, because large amounts of iridium were found in the Yucatan Peninsula. This was also found in the asteroid when it hit the earth. Today, scientist believes that this is one of the most accurate theories ever stated. Since this occurred during the end of the Cretaceous period, it was this very time of continental drift and volcanic.

However, there are many other different theories that state the extinction of dinosaur. Some of the theories stated were as follows; the volcanic theory and the marine regression theory. The marine regression theory states that dinosaurs became extinct due to the decreasing ecosystem. And it is believed that if the land system is disturbed then the oceanic system is also disturbed and it was during this time that many sea animals die out.  

Because the earth changed so they turned into bones