Tepuis, or tabletop mountains are
located at the northern edge of the Amazon rain forest. They are one of the most unique mountains because
they are ringed by sheer cliffs that are thousands of feet tall. In order to reach the tops of the tepuis you
either have to climb the sheer cliffs or take a helicopter. Scientists are wondering how animals got to
the top of the peaks. It seems that the
scientists looked at genetics and DNA to answer these questions. They looked at common ancestors and tried to
find out when the DNA became different.
They can up with the hypothesis that the animals either climbed up the
mountains because of this genetic change.
http://www.nytimes.com/2012/05/08/science/its-not-so-lonely-at-the-top-tepui-ecosystems-thrive-up-high.html?_r=1&ref=dnadeoxyribonucleicacid
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