Giraffe Genetic Secret: DNA Evidence Exposes Four Species
A BBC News article released on September 10 proposes that there may be four species of our favorite gangly, savanna mammal instead of the previously assumed one. Nuclear DNA evidence suggests that these four species have been separated for 1-2 millions of years, a clear sign of separate species evolution. Research has shown that the genetic differences between them are as significant as those between a polar bear and a brown bear. Though these species physically appear very similar, the differences likely involve evolutionary adaptions to specific environments and behavior. Understanding of these species' differences will help conserve all four species.
Thea Anderson
http://www.bbc.com/news/science-environment-37311716
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