How does one species evolve into two within the same habitat? Discover the details behind a rare type of evolution: sympatric evolution.

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Sources:
http://www.pbs.org/wgbh/evolution/library/05/2/l_052_03.html
https://www.nationalgeographic.org/encyclopedia/speciation/
http://www.sciencedirect.com/science/article/pii/S0960982207016259
http://evolution.berkeley.edu/evolibrary/article/speciationmodes_05
https://www.researchgate.net/publication/7306285_Sympatric_speciation_in_Nicaraguan_Crater_Lake_cichlid_fish