Taking a Look at Tunguska Explosion

Then in 1991, a massive meteor crater 110 miles in diameter was discovered on the edge of the Yucatán Peninsula, extending into the Gulf of Mexico. The Chicxulub Crater, as it was dubbed, was named for a nearby village. Scientists believe the bolide that formed it was roughly 6 miles in diameter, struck the earth at 40,000 miles per hour and released 2 million times more

Published on March 9, 2005 by Robert Roy Britt there is a new theory that explains how the meteor crater near Winslow Arizona was formed. The asteroid that created the crater is believed to have been traveling much slower than originally thought. The article suggests that the meteor was traveling at speeds greater than ten time the speed of a bullet shot from a rifle.

However, this happened around 50,000 years ago, resulting in a crater 1 mile across, 2.4 miles in circumference and more than 700 feet deep. The impact of the meteor had energy of more than 20-million tons of TNT, and shook the southwestern plain for miles. The meteor left little evidence of its origin behind, it vaporized on impact with the earth. Moreover, erosion has done little to change the original crater.

[3] All kinds of creatures spawned from the meteor, ravaging the Earth. Each one destroying everything in its path. People panicked, they thought it was the end of everything. However, monsters and

Giant Impact Theory states that a Mars sized object slammed into the Earth, knocking off a huge piece of the planet. The debris first formed a ring that quickly collided into the Moon, while the impactor probably crashed later into the Sun. The theory was put forward by men that were named Dr. William K. Hartmann and Dr. Donald R. Davis in a 1975 article in Icarus. The giant impact theory is the most accurate theory compared to the other theory's: Capture Theory, sister theory, and fission theory.

The Cretaceous-Tertiary extinction, also known as the K-T extinction, was a global extinction event that struck the Yucatan Peninsula at the end of the end of the Mesozoic Era, 65 million years ago. Walter Alvarez first discovered a meteorite big enough to be called a small asteroid that hit the Earth, creating the Chicxulub crater. Once the asteroid struck the North American continent, there were igneous rocks underneath the crater that contained high levels of a rare siderophile element, iridium. This catrostopic event had a massive effect on the environment, as several mammals, birds, and plants became extinct. It also caused an impact winter that made it impossible for plants and plankton to photosynthesis, as 75% of inland animals and 90% of marine species were affected. Not only did it cause an impact winter, but the asteroid also caused volcanic eruptions, climate change and sea level rise. Geologists have also found rich dinosaur, plant and marine fossils to illustrate the K-T extinction. This event not only caused species to become extinct, but it also had an adaptive radiation, as other species were able to diversify.

The author of this article is Meera Dolasia, the title is “An Asteroid The Size Of A Bus Just Zipped Past Earth!” The article is about an asteroid really big and was going right past earth. Scientists didn’t see it coming because it “Snuck up” on them. Apparently, it wouldn’t cause any damage to the earth. It would have exploded 10 miles above the earth’s surface. It won't cause any damage because when it would hit our atmosphere it would disintegrate into pieces. I think it would disintegrate into pieces because if something lands in our atmosphere it would be set on fire, explode or break into pieces. It would not do anything because in the article it says “It would have exploded and released almost 700 kilotons worth of energy. While

While testing the layer of clay they discovered traces of iridium which is typically found in meteoroids. It could not have been asteroid dust that had just fallen from the sky because of how much iridium that was found there, it must have been a meteorite that struck earth. From different parts around the the world paleontologists had found this similar clay layer between the rocks and was found with traces of iridium. Iridium is rare on earth and since they knew how much iridium is in a meteor, they were able to determine that is was possible a meteorite had struck the earth. In 1980 the asteroid impact theory was put up front to determine and find more evidence if a meteor was the actual cause. There was some evidence that a meteor caused the mass extinction but what they could not find was a meteor crater. Until 1991, more evidence was found that supported the idea that a meteor was the possible cause of the extinction because a meteor impact crater called Chicxulub was found off the Yucatan Peninsula in Mexico. It was similar in size and age as when the meteor hit 65 millions years ago. Iridium was found in the crater site making it possible that it was the crash site. Another thing found in the site was shocked quartz, it is when

not fully understood. Scientists still debate whether it was a comet or asteroid, if similar

Clemens Rumpf from University of Southampton, and his associates, speculated the casualties from an asteroid and how it would impact Earth. These researchers studied the effects it would cause on Earth by researching, “asteroids that burn up ompletely [sic] before impact, those that hit the ground and those that strike in water” (Crane 1).

In 2005, NASA launched a rocket containing a spacecraft designed to go on a new terrain that no craft had ever come near to touching down on: comets. Comets had been known about for centuries before, and were only one in an extensive list of objects in space that were untouched by NASA. The scientists behind the brand-new mission believed that if meteoroids held may clues to questions about the formation and constant changes in the solar system, then why wouldn’t comets do the same? After all, meteoroids and comets were both composed of rocky debris, originated from their own special “belts”, and orbited the Sun. The mission was also made to find out if comets had different compositions on the inside than the outside, and observe other such things that telescopes and satellites in Earth’s atmosphere or low orbit could not observe at such detail and quality as to gain new information about comets.

Many amounts of asteroid elements such as iridium were found in rock debris along with other asteroid particles. The discovery of Iridium sparked the attention of multiple scientists and researchers. Iridium is rare in the Earth’s crust, but it is plentiful in most asteroids and large meteorites. With Iridium found in the Earth’s crust, researchers have concluded that an asteroid composed of Iridium struck Earth at its boundaries of layers. Further studies have indicated that this Iridium layer has been found in more than 100 locations around the globe, providing data that this event was truly universal (“Dinosaurs.”). In addition, the measurements and evidence are accurate with the asteroid that made impact. After many decades of research and searching scientists identified a massive crater associated with materials of Iridium. Many pieces Iridium are buried beneath sentiments of rock, many surrounding the coast of Yucatan. Debris and sediments are revealed by high graphing the strength and power of gravity over that area. With these statistics and drilling methods to observe the area, it is concluded that a relatively large impact happened 65 million years ago. After the calculations and drilling, astronomers charted many asteroids that have crossed Earth’s orbit and atmosphere. From abundant study efforts and orbital data, it is estimated that asteroids of

This asteroid entered the Earth's atmosphere on January 18, 2000, and when it eventually exploded in the sky, exploded with the Force of about five to ten thousand tons of dynamite. For the first time, scientists were able to recover the fragments of the fallen meteor and bring them back to a lab in a frozen state and untouched. When taken back to a lab for examination, the meteor was discovered to carbonaceous chondrites. This was rare, because carbonaceous chondrites are very fragile, and usually break apart and disintegrate upon reentry into the Earth's atmosphere, and even if they survive reentry, are susceptible to weathering on the ground. Out of all the asteroids to descend onto Earth, only 2% are carbonaceous chondrite

Then the movie was focus on the questions, could such a collision happen again? and is there anything we can do to prevent another major collision if imminent? Although there are many asteroids that strike the Earth everyday, their size and impacts are very small which goes unnoticed in most cases. Some of the asteroids even burns off in the atmosphere before it strike the Earth’s surface. But the crater in the Northern Arizona is one of crater that has attracted us

The asteroid instantaneously made a hole that was 100km wide and 30km deep. Experts say that " it hit at the same energy as 100 million atomic bombs and left behind a 100-mile-wide scar known today as the Chicxulub creator” Many scientists believe that the impact of the Chicxulub asteroid played a big part in the "KT Extinction" which was the extinction of almost all life on earth, including the dinosaurs. When the bowl collapsed it left behind a 200km creator across and a couple of km deep. Later, on the centre of the crater "rebounder and collapsed again", this time it produced an inner ring. Now days a larger percentage of the creator is buried offshore, under about 600m of sediments. The parts of the crater that are still on land are cover in limestone and at the rim of the crater there is an arc of