One gene causes one trait or a specific illness. When doctors use genetics, it's usually to try to identify a disease-causing ...

Your DNA contains millions of genetic variants that interact with each other in ways that affect whether diseases such as ...

There are now at least 13 species of finches on the Galapagos Islands, each filling a different niche on different islands. All of them evolved from one ancestral species, which colonized the islands ...

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Christina Majaski writes and edits finance, credit cards, and travel content. She has 14+ years of experience with print and digital publications. Robert Kelly is managing director of XTS Energy LLC, ...