Why some straight men have sex with other men

Sexual identities and sexual behaviors don't always match because sexuality is multidimensional. Many people recognize sexual fluidity, and some even identify as "mostly straight."

Fishing selects small, shy fish for survival

Fishing primarily removes larger and more active fish from populations. It thus acts as a selection factor that favors shy fish, as a recent study by the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB) ...

Sex, flies and videotape

On a hot summer day, in a darkened chamber, a video camera follows a couple as it engages in nature's oldest game—courtship. The male sings and chases after the female when suddenly a long tubular organ emerges from her ...

Researchers discover new sex hormone

When University of Ottawa biologists Kim Mitchell and Vance Trudeau began studying the effects of gene mutations in zebrafish, they uncovered new functions that regulate how males and females interact while mating. We sat ...

Let's talk about gay penguins: Munich zoo joins Pride week

Organisers of this year's Gay Pride week in Munich have a group of rather wild partners—penguins, giraffes and lions at the city zoo where tours are being run about same-sex love in the animal kingdom.

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