Extinction events

China, where a type of extinct, eel-like creature known as a conodont first appeared, according to the International commission on stratigraphy. Life and climate The Mesozoic Era he Mesozoic Era began roughly around the time of the end-Permian extinction, which wiped out 96 percent of marine life and 70 percent of all terrestrial species on the planet. Life slowly rebounded, eventually giving way to a flourishing diversity of animals, from massive lizards to monstrous dinosaurs. The Triassic period

Human culture exploded with the invention of agriculture approximately 10,000 years ago in the Fertile Crescent. For the first time, instead of being largely nomadic, following herds of game animals through their migrations, humanity could settle down into permanent settlements. For the first time since the dawn of man, not every waking hour revolved around food. Man finally had a large amount of leisure time, and energy to spare. This energy went into the creation of vast cities and temples, great

a milder climate; the weather was warm and the atmosphere contained a lot of moisture. Although, when Gondwana finally settled on the South Pole, massive glaciers formed, and caused shallow seas, and sea levels to drop. This most likely caused extinctions at the end of the Ordovician in which 60% of all marine invertebrate genera and 25% of all families went extinct. The ecosystems was still dominized by algae and sponges, and in some cases by bryozoans. However, there apparently were also periods

Danger around the Earth: Pollution Pollution is now out of this world because according to “Cleaning up the Space Junk” “the National Aeronautics and Space Administration or NASA has estimated that about 22,000 pieces of this pollution are as large as a softball and about 500,000 of them are closer to the size of a marble and there are possibly hundreds of millions of smaller pieces are also floating around the planet”.Based on the video “Space Junk” “the fail of Cosmos 54 led to fear of radioactive

Alfred Wegener’s theory about the continents moving was continental drift. He based his argument over the observation the many of the coastlines on opposite sides of the ocean fit together. This observation and the idea that continents had once been joined, had been made previously. Abraham Ortelius a Flemish mapmaker from and geographer in the 1500s Pointed out that the coasts of the Americas and Europe and Africa matched and this suggested they had been torn apart from each other. Alfred also noticed

Dinosaurs roamed the earth many million years ago while roaming parts of Maryland for many of their history here on earth. There were many species that were predominantly found in this location. Around twelve species of dinosaur like animals can be traced back to these parts of Maryland. Dinosaurs wandered in this area from Late Triassic to Late Cretaceous periods. Maryland had a distinct climate changes during these periods. Once it was tropical and had volcanoes and changed to warm and shallow

period lasted 53 million years and consisted of mostly shallow oceans covering the continents. Skeletons grew in life forms and new life forms exploded across the shallow seas. Shortly after this time, the Earth underwent its first mass extinction. The extinction led into the Silurian and Devonian periods where life moved onto land. Plants began to grow and new fishes began to

Humans have many methods to describe large numbers mathematically. Ever since the invention of the concept of zero -- essential to the ancients for keeping good records of various transactions -- humans have been using mathematics to describe ever larger quantities of items. The story of the king and the chessboard of wheat demonstrates that while humans have been using large numbers since the dawn of history; using and comprehending are two entirely different things. In the story, a king tells a

The triassic period lasted for 37 million years, from 245 to 208 million years ago. The Triassic started with a generally warm and wet atmosphere . Be that as it may, fossilized sand found in later Triassic strata propose that the general atmosphere was hot and dry, albeit a few zones may have had characterized stormy seasons. Fossils found in Triassic rocks propose this was a time of progress, in which more established types of plants and creatures ceased to exist and new ones started to show up

Tyrannosaurs Rex, better known as the T-Rex, which means Tyrant lizard king lived during the late Cretaceous period, about 85 million to 65 million years ago. They were 40 feet long and 20 feet tall and weighed up to 7.5 tons. They were strictly carnivores and used their very sharp teeth to eat other dinosaurs. Fossils were discovered in Western North America and the skull of a T- Rex alone measured up to 1.5m(5ft) long. The also have the record of having the largest tooth of any carnivorous dinosaur