Sex

Two new studies are shedding light on the mystery of why women suffer from Alzheimer’s at higher rates than men. As well as discovering sex-specific genes associated with Alzheimer’s risk, the researchers describe how toxic dementia-causing proteins spread differently through female brains.

A thought-provoking study has presented a comparison between male and female serial killers. The sex differences in behaviors and crimes have been framed through a lens of evolutionary psychology suggesting our hunter-gatherer history has manifested differences between male & female serial killers.

It’s generally understood that an embryo with two X chromosomes will develop as female, while an XY combo will be male. But this simple rule may be too simple. A new genetics study out of Australia has identified extra pieces of the puzzle that could explain some disorders of sex development (DSD).

A new study has identified twelve significant genetic differences between transgender women and non-transgender males. It is hypothesized that these genes, known to be involved in sex hormone signaling, possibly contribute to a person's ultimate sense of gender identity.

Most species of termites reproduce the old fashioned way. But nature, always looking for more efficient ways to do things, may be in the process of removing unnecessary steps in the process – males. Researchers have now found colonies with no male termites at all, and they seem to be thriving.

There have been a number of studies suggesting cycling can have a negative impact on a man's nether regions, but a new report indicates it's safe for men to get in the saddle as cycling doesn't pose an increased risk of sexual or urinary dysfunction.

Great news! According to the results of a new study, sexual activity is very unlikely to result in a sudden cardiac arrest, especially if you are a woman. On the flip side, if you are unlucky enough to experience a not-so-happy ending, your chances of survival are pretty poor.

​Traditionally the sex of a blood donor has been considered irrelevant when giving a blood transfusion, but a study is raising concerns suggesting blood transfusions delivered to men using blood from previously pregnant women could increase their risk of dying in the years following the transfusion

​A study from two Stanford researchers has caused shockwaves around the world. The duo reportedly developed a neural network that could detect the sexual orientation of a person by studying a single facial image. But is this a scientific study that has gone one step too far?

​Is sex overrated? The asexual root-knot nematode might think so. It has evolved to reproduce without sex and while this might not sound like a life worth living, it has turned them into far more efficient crop-killing machines than their sexually reproducing cousins.

As unassuming as it might look, the unisexual Ambystoma salamander has been breaking evolution’s rules for millions of years to establish a girls-only lineage. A new study sheds light on the genetic balancing act these lady salamanders perform to survive and thrive.​​

It's a cutthroat world​ out there, and the male cuttlefish is not above using sneaky tactics to fool rivals. But what causes a mild-mannered trickster to morph into a fighter? The answer can be found in the footage below, the first of its kind to capture a male cuttlefish brawl in the wild.​​