National Geographic explores the science of same-sex attraction

Watch this National Geographic (2008) video to learn about the scientific research on the development of same-sex attraction, including what scientists have learned from studying twins.

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National Geographic explains the biology of homosexuality [Video File]. Retrieved from www.youtube.com/watch?v=saO_RFWWVVA

Gender Identity Gender identity icon Our core sense of who we are as a man, a woman, a mixture of both, or neither.

Gender Expression Gender expression icon How we show up in the world through choices like clothing, hair style, mannerisms or tone of voice.

Attraction attraction icon How we feel toward others sexually, romantically and/or emotionally.

Biological Sex Biological sex icon Physical attributes such as reproductive organs and genitalia, chromosomes, genes and hormone levels.