6. hybridization

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Hybridization in nature is actually more common than was previously thought. Ligers may not pop up in nature due to the geographical separation of lions and tigers, but a new species of monkey discovered in 2003 had evidence of baboon ancestry in its mitochondrial DNA. In 2010, scientists proposed that a species of fruit bat was actually derived from hybridization between two other bat species. And in 2012, a new species of monkey flower, the result of hybridization, was discovered in Scotland.

