The Pleistocene Extinction Theories all discuss the extinction of the large mammals know as Mega faunas. These theories take place about 9,000 years ago during the last Wisconsinian advance. There are four main theories that scientist predict happened: Climate change, Humanity presence, Human disease, Comet. The climate change theory states that during the increase and decrease in the climate temperature the faunas that could not adapt to the intense change started dying off. The humanity presence theory talks about when humans started moving and spreading across the planet, they started hunting certain animals. The human disease theory states as humans moved around and settled, they brought with them a horrible disease that the faunas could not fight off. The comet theory states that a large comet hit the Earth’s surface and exploded killing off majority of the animals.
In my opinion I believe that a few of these events occurred at the same time and caused the extinction of the mega faunas. Humans hunting and the climate change played a major role of why these animals are extinct. I believe as humans saw the climate change affecting the animals and making them week, they took their chances against large animals like mammoths and killed them off. After one species was gone, they would move on to the next and so on.
http://www.bibliotecapleyades.net/imagenes_ciencia/asteroids_comets17_04.jpg
Work Cited
Work Cited
"Holocene
Extinction." Wikipedia. Wikimedia Foundation, 05 Mar. 2014. Web. 01
Apr. 2014. <http://en.wikipedia.org/wiki/Holocene_extinction>.
"The
Pleistocene Epoch." N.p., n.d. Web. 01 Apr. 2014.
<https://mycourses.purduecal.edu/bbcswebdav/pid-2980340-dt-content-rid-9844464_1/courses/cal_66429.213142/Pleist%20extinction%20causes%20L8.jpg>.
"Quaternary
Extinction Event." Wikipedia. Wikimedia Foundation, 05 Mar. 2014.
Web. 01 Apr. 2014.
<http://en.wikipedia.org/wiki/Quaternary_extinction_event>.
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