Physical differences exist between male and female flamingos. Differences can be subtle, however, making gender determination difficult.

While both are arachnids and spine chilling to behold, there are many differences between a male vs female black widow spider ...

It has been a busy summer for the captive breeding programs at your Guam Department of Agriculture. Aviculture staff for the ...

Male and female black widow spiders exhibit striking sexual dimorphism. Females are significantly larger, darker, and possess ...

Genetically engineered breeders that lay only female chicks would eliminate the culling of day-old male chicks.

Fans of the birds, whose lives have been compared to Game of Thrones, are currently waiting with bated breath for this year's ...

A man who was born with male and female genitalia knew he was different but didn't find out the truth for five decades. When ...

Paleontologists have long wrestled with how to differentiate between male and female dinosaurs based on their fossils.

Scientists named the half-male, half-female spider after an One Piece anime character who can change sex at will.

From OnlyFans, vacation spending or checking in before getting tattoos, we dive into the nitty-gritty of making a ...

Rob Wilson, 64 has opened up about his life growing up Intersex - including his theory about how he came to be born with the ...

Benson Kipruto won the men’s race by three-hundredths of a second, and Hellen Obiri won the women’s race, obliterating the ...