Ostraderm remains from Ordovician rocks comprised some of the oldest vertebrate fossils. The ostraderm was discovered to be a jawless, armored fish.” (UCMP) “Trilobites did not die out when the mass extinction occurred at the end of the Cambrian period. These beings lived on and many more new species developed. Cephalopods became the dominant predators during the Ordovician period. Cephalopods are a group of mollusks that are related to the octopus and squid.
As the more heat hold by greenhouse gasses, the temperate will rise, which cause climate change. First demonstrated of atmospheric carbon dioxide in warming the Earth's surface was Swedish scientist Svante Arrhenius over 100 years ago. Ever since scientific data have established at the time. Since then, scientists have recorded every change of temperature by analysis the atmospheric CO2. The record shows burning coals, oil and natural gas have emitted roughly 500 billion tons of CO2 that abort by the atmosphere since Industrial Revolution (NWF).
Additionally, other lizards are arboreal, aquatic, and burrowing. Aerial reptiles like the Pterosaurs, however, became extinct at the end of the Cretaceous Period, while Megalania ceases to exist in the Quaternary Period. Many of the reptiles exhibit reduction or absolute loss of limbs as seen in some legless species like the glass lizard and worm
animals and plants, aquatic and terrestrial) all around the world are involved (Benton, 2011). There have five major extinction events in the last 600 million years ago, the Late Ordovician, Late Devonian, Late Permian, Late Triassic and end-Cretaceous (K–T), respectively in that order (Twitchett, 2006). The Permian-Triassic mass extinction happened in between the Palaeozoic and Mesozoic eras, about 251 million years ago (Jablonski, 1995). This mass extinction was the most devastating by a big margin, this claimed 95% of all aquatic species, which dramatically changed life in the ocean. Land plants and
After this came the Devonian period which was 416 million years ago. The cephalaspis swam in freshwater and evolved so it could swim in water and walk on land. Two million year later, 2.5 million years ago, was the very well known Triassic period. This is when the earliest dinosaurs roamed the Earth. This is also when the first mammals were being born and evolving.
This is a usual portion of evolution .But from time to time extinctions transpire at a far faster rate than usual. For example, at the conclude of the Cretaceous era 65 million years ago, a mass demise provoked the demise of countless disparate kinds of animals and plants, encompassing the dinosaurs .Dinosaur Nowadays human interference is additionally provoking quick extinction. It is this kind of demise, provoked by humans, which we deal
Archaeologist discovers the the bones of dinosaurs from different time periods. Some believe that a large asteroid hit the earth, killing all living matter. Others believe that a huge volcano erupted on earth killing all matter on earth quickly. One other theory of the death of the dinosaurs is the continental drift, this was a slow killing because of the cooling and drying climate. The last theory is in the bible, they believe the flood caused all the dinosaurs to die out.
It can be able to destroy all the civilization easily by causing a lot of harming effects. It can cause the changing of the temperature to make a lot of living things cannot be adapted with t new habitats. Then there will be a lot of extinctions on Earth. Now the scientists have predicted that the next animal will extinct may be Polar bear because their population is very small now and the activations of global warming also affect those populations. There are also other reasons why polar bears will be extinct like the human activities.
Life evolved accordingly. Then Ordovician Ordeal followed and wiped out 85% of life on Earth. Then life took the form of dinosaurs and ruled Earth for thousands of years. In this time, life evolved so much that there was development of flight, birth of the first known mammals and many more wonders. Then came the meteor that wiped out the dinosaurs and some other forms of life.
Clearly, scientists don’t know exactly what happened to dinosaurs they can only infer based off of evidence they have found. “...we could make inferences about the ecosystems they thrived in and the conditions that drove them to extinction…” This states, that if they know for sure what cause animals to go extinct not just possible theories they could modify or change what went wrong. As an example, hunting is what cause the passenger pigeons to go extinct. Since we humans know what caused their extinction we could bring them back and change the fact that we put them into extinction. Of course, humans couldn’t change natural disasters but we can change the fact we use so much paper, or drilling for oils in certain places.