Cretaceous–Tertiary extinction event

continent of Gondwana. Then Gondwana drifted south during this time, then finally settled in the Southern Hemisphere. The climate was mostly warm and humid and during this time sea levels were rising. At the end of the Ordovician period there was a mass extinction. The third period in the Paleozoic Era was the Silurian Period. During this time sea levels were rising more and continental land masses were low. Also, having a warm climate caused ice glaciers to melt. Gondwana was still located in…

The Sixth Extinction: An Unnatural History is by Elizabeth Kolbert. Kolbert is an American journalist, observer, author, and staff writer at The New Yorker. The Sixth Extinction won the Pulitzer Prize in 2015; I chose this nonfiction book because I hadn’t heard of the concept of a sixth extinction. I had previously learned of multiple extinctions that occurred in the Cretaceous, Ordovician, Permian, and Triassic-Jurassic periods, but I became curious just by the thought of what Kolbert meant by…

Chicxulub Crater and Mass Extinctions.” This book began talking about the five mass extinctions and what a mass extinction was. It stated that the best studied of all mass extinctions was the fifth mass extinction. This is because it was the closest to us in time, and it wiped out roughly 70% of all species. This lead to the books next topic, how this mass extinction occurred. In the beginning, most scientists were gradualists, meaning they believed the fifth mass extinction happened gradually.…

Brontosaurus Othniel Charles Marsh discovered and named the Brontosaurus (Greek “thunder lizard”), a four-legged dinosaur in 1879. With at least three known species, this dinosaur lived in the Morrison Formation of present day Western US, during the late Jurassic Period and became extinct by the end of the period. Perhaps one of the most controversially classified dinosaurs, paleontologists have reclassified the Brontosaurus several times since its discovery to an extent that some quarters…

Five extinctions of Earth and Who will be Next? The Earth we live on now is drastically different from how it was millions of years ago. The Earth has gone through many changes and events though time. There are five major events in history that have changed the world. Without these five mass extinctions who knows what Earth would have looked like, and if humans would even be alive. In the ordovician period 439 million years ago there was a mass extinction that wiped out 89% of life on Earth.…

believed to be wiped out by a meteorite/asteroid or another catastrophic event. How did an asteroid cause a mass extinction causing the majority of a planet’s population to die? Newton’s laws of motion can explain how and why a asteroid caused a mass extinction wiping out an entire planet’s evolution. Scientist have multiple hypotheses leading to the end of the Cretaceous Era or T-K event. One of such, is the astronomical event that hit the earth sending an immense amount of debris and dust…

Our planet is in the middle of the sixth mass extinction of mammals, fish, amphibians, reptiles, birds and plants. We are currently experiencing the worst case of extinction than the dinosaurs which was 65 million years ago. Extinction may be a natural event but there has been a recent increase of species extinction from 1000 to 10,000 per year. This means in the future we may lose species every day [1]. Before extinction was caused by earthquakes, volcanic eruption and climate change but this…

DAYER prologue Long time ago before dinosaurs an evil, merciless species reign happened, They were the Dayers. The Dayers possessed an enormous powers, but they never knew their capacity. They could transform into infinity numbers of power level, but as time went by dinosaurs came along, and as dinosaurs’ population aggressed, dinosaurs started dominating the Dayers. Even one Dayer is able to win a fight against 1,000 dinosaurs if they had developed their skills of fighting.Now those…

Almost 70 million years ago, the most recent of apocalyptic extinction events occurred, wiping out the dinosaurs and signaling the start of a new era. The Cenozoic Era (age of mammals) has been split into seven sections called epochs with the final epoch being called the Holocene epoch, which brought forth a new ecosystem that harbored humanity. To conclude the eras that occurred previously, there have been five apocalyptic extinction events that occur roughly every 100 million year, and…

The Permian Mass Extinction Introduction There are five major extinctions in history: the Late Devonian, the Ordovician-Silurian, the Permian-Triassic, the Triassic-Jurassic, and the Cretaceous-Tertiary. Known as the Big Five, these extinctions exceeded all others in size and destruction, each killing more than 60% of species from that period. Each one acted as a bottleneck, allowing the survival of only a fraction of the organisms that had been thriving before, from which evolution and life…