Shocking before-and-after images of NASA's stranded astronauts show the terrifying damage that months spent in the harsh ...

Look at one and then the other. Can you tell which brain is female and which is male? You can't. Humanity has been hunting for sex-based differences in the brain since at least the time of the ...

This article will review male- and female-pattern baldness signs, what causes it, and potential treatment options. It's important to note that while the terms "male-pattern baldness" and ...

Evidence of sexual exchange of bacterial vaginosis–associated organisms between partners suggests that male-partner treatment may increase the likelihood of cure. This open-label, randomized ...

There is only a weak link between brain structure and behavioral variations, with this weak relationship largely explained by brain size, because male brains on average are 10 to 15 percent larger ...

However, the sex tech revolution that began in the 1960s has led to a boom in automated sex toys and, specifically, male masturbators. These penetrative playthings, often designed to mimic the ...

We’re not here to compare species, though. Instead, we’re trying to answer a more common question: How can you tell the difference between a male and a female guinea fowl? Well, we’ve identified four ...