What Happened to the Dinosours?

OUTLINE   WHAT HAPPENED TO THE DINOSOURS
INTRODUCTION
i. I bet there are few people that do not know regarding dinosaurs.Especially how the dinosaurs dead and gone.
ii. Today,i would like to inform about what happened to dinosours which are the most priceless treasure that we have in this world.
iii. To inform about the palaeontolagy,the study of fossil which are the remains of the past ages.
iv. There is one method that have been used to determine the fossils is radiocarbon dating.It measure the rate of carbon decaying in the fossil.
A.But,there are several problems with this technique.Its so hard to determine     the the concentration of carbon since the level of radioactive has fallen so low.
B.In addition, even in more recent specimens,the level of radioactive has fall so low.So,with the great difficulty the specimen can be measured.

    BODY
i. There are many rumors and theories that conlude the extinction of dinosours.
ii. The most popular theory is a big comet had crashed into the earth,the size of comet or asteroid is approximately 6 to 12 miles.
iii. It cause darkness for many months,since lots of dust were spread all over the earth.
iv. A global wildfire would have destroyed over half of all living things. Water would have been poisoned in most places, and the earth would have sunk into a deep freeze while the dust was in the air.
v. However,before the comet came to the earth,there are changes in earth’s climate.Such as,massive volcanoes were erupting,earthquake,hurricane.

CONCLUSION
i. As we have seen,the comet and the earth’s climate are the main cause that creatures that were able to survive all these changes came to dominate the   landscape.
ii. These events were also bring in a new climatic cycle to the earth and the
                    mammals grew larger, and moved into new areas, taking over locations that  
                    had previously been the habitat of dinosaurs.Changes in sea levels, ocean...