Asteroid Attack 3.9 Billion Years Ago May Have Enhanced Early Life On Earth

Author: Will

Link: http://www.sciencedaily.com/releases/2009/05/090520140403.htm

Summary:
A Study done by the University of Colorado at Boulder shows that although there were meteors the size of kansas hitting the Earth, it may have actually helped early life. The results from the study push the initial 3.9 billion years ago date of life on earth all the way back to 4.4 billion years ago. The bombardment of Earth with meteors was said to have lasted anywhere from 20 million years to 200 million years. Researchers concluded that subterranean microbes living at temperatures of 175 to 230 degrees may have flourished during the bombardment period. Planetary scientists also believe that a planet the size of mars glanced off of Earth 4.5 billion years ago. This event would have effectively hit the Earth's reset button.

Why I Chose this Article:
I chose this article because I am really interested in space because it is so vast and large and full of things unknown to humans. I love learning about the events of Earth's early life. I also find this article scary, and that somehow draws me towards it.