Cretaceous–Tertiary extinction event

(2001), and Barnosky et al. (2011) talked about the impact of mass extinction on the biological history of earth. Benton (1995) talked about how mass extinction drives diversification in the biological community, Erwin (2001) discussed on how species recovery occurs after mass extinction and Barnosky et al. (2011) talked about the possibility of future mass extinction based on the comparison between the present and past extinction data. According to Benton (1995), the massive…

To begin with, 65 million years ago was the start of the Paleocene epoch that was the establishment of the tertiary period on earth. Due to the extinction of the dinosaurs during the previous period, there was a heap amount of mammals accumulating and evolving from their original size and aspects. Many forms of animals existed big, small, and of many different sizes; rapidly increasing in numbers by reproduction. In this epoch, carnivores were very large in numbers. For example, a bird that was…

AMERICANA SO IMPORTANT? Before I give the importance to these amazing creatures I would like you to know first what this creatures are. These creatures have existed for more than 300 million years. Meaning they have survived at least one massive extinction event and numerous catastrophes. Scientists have identified approximately 4,500 species of these creatures and 30 are classified as pests. And guess where Periplaneta Americana is identified? These creatures are hard to kill and they are…

For 16 years, scientists wondered just what had happened with corals in the Florida Keys. In this time period, over half of the corals had perished. They later discovered that the greatest decline was in elkhorn coral. Finally, research showed that the massive coral disappearances were caused by a disease by the name of white pox. The scientists have solved the elkhorn coral mystery using the scientific method - by making observations, conducting experiments, and drawing conclusions. Initially,…

unexpected events happen that made the planet earth to transform radically. This event is known as the Permian Triassic Mass Extinction or also called by many the Great Dying. This mass extinction is known as the worst extinction comparing them to the Ordovician, Devonian and the Cretaceous Extinction. Some individuals are not award that the Permian –Triassic are two forming boundary between the end of the Permian and the beginning of the Triassic period. The Permian-Triassic Extinction almost…

that during life on Earth there has been 5 mass extinctions. These mass extinctions are said to be a normal part  of life and might even be an important factor for life on Earth. The main mass extinctions that have been discovered are the Ordovician Mass Extinction, the Devonian, Permian, Triassic, and the Cretaceous Mass Extinction. Scientists now even believe that we are not only part of the problem but the main subjects of the sixth mass extinction caused by Homo sapiens (humans). Andrew…

Aleechia Gill 09/29/16 RFJ 5 Mass extinctions are a number of events in which a large percentage of the species on the planet go extinct and have a great impact on today’s living things. There have been at least five mass extinctions recorded in the history of the Earth thus far. The earth lost more than 75 percent of its species. It is being debated that we are currently in the sixth mass extinction. Graptolites, it began with the filtered-fed animals and colony builders, which disappeared…

Almost 4.5 billion years ago, the Earth, newly formed, had possibly the hottest climate in the planet’s extensive past. Temperatures were scorching, enough to liquefy rocks. As radioactive elements located in Earth’s core decay, they generate heat and pressure shoving molten rock toward Earth’s surface. Along with bringing molten rock to the surface, volcanoes also released heat and emitted carbon dioxide into the atmosphere, initiating the greenhouse effect which leads on to global warming.…

Earth, mass extinctions of unimaginable death scale almost wiped out most of the life on the planet. The last event occurred 65 million years ago when Earth was impacted by an asteroid killing the dinosaurs and other organisms (70 per cent of the species). The deadliest of these extinction events happened more than 252 million years ago. The event is known as the Permian-Triassic Extinction Event or the “Great Dying” that killed around 90 per cent of all species on Earth. This event was caused…

Silurian extinction This extinction happened about 439 million years ago because of a drop in sea levels as glaciers formed. An ice age has been blamed for the cause of the extinctions. A large ice sheet in the southern hemisphere caused climate change and a decrease in sea levels. A combination of this lowering of sea level caused a reduction in ecospace on continental shelves, and the cooling caused by the glaciation itself are some of the big factors for the Ordovician mass extinction. This…