Why Dinosaurs are Extinct

Essay specific features

 

Issue:

Science

 

Written by:

Paul O

 

Date added:

July 14, 2015

 

Level:

University

 

Grade:

B

 

No of pages / words:

2 / 403

 

Was viewed:

1379 times

 

Rating of current essay:

 
Essay content:

[1] The crater is not visible from the ground at all, but images from the space shuttle have provided the most striking visual evidence yet (see small diagram half way down this page: [2]). It's 100-150 miles wide, buried under a half mile of sediment, and covered with jungle. It was detected while taking core samples and performing seismic monitoring while looking for oil...
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It was detected while taking core samples and performing seismic monitoring while looking for oil. The crater contains a lot of iridium, an element that's rare on earth but present in most asteroids, providing evidence that it is an asteroid impact crater. The impact hypothesis was first proposed in 1980 but was very controversial...
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