Humans May Have Adopted Monogamy To Avoid STIs

Human Monogamy

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A study published Tuesday in Nature Communications claims that fear of sexually transmitted infections among our prehistoric ancestors may have been the very cause of human monogamy.

University of Waterloo professor Chris Bauch and his research partner, Richard McElreath, of the Max Planck Institute for Evolutionary Anthropology, hypothesized that high rates of STIs like syphilis, chlamydia, and gonorrhea caused early humans to change their mating behavior in order to survive. This, they say, is when the social norms that so many of us still live by today first began to develop.

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Can People Actually Get Turned On By Robots?

Robot Sex

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A recent Stanford University study that saw researchers building on the idea of the “uncanny valley” has turned up some surprising results.

The uncanny valley hypothesis describes the U-shaped relationship between how “human” a robot looks, and how comfortably humans receive them. The theory suggests that for a “familiar but distinctly non-human robot,” a natural human response would be “to look at them as a friendly, non-threatening computer,” according to the study’s press release.

Stanford researchers took the concept one step further, asking if these robots could provoke a stronger emotional response than friendliness in humans, such as physiological arousal (in layman’s terms: Can humans get turned on by robots?)

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Why Are Girls Starting Their Period Younger And Younger?

We often take the age a girl starts her period for granted. But history shows us that, since Medieval times, that age has been getting steadily lower.


Image Source: Wikimedia Commons

On average, a woman will have approximately 450 periods in her lifetime. With bleeding typically lasting anywhere from 5-7 days, a woman spends around 2,700 days of her life bleeding.

Most young women today get their first period (called menarche) at around 12.5 years old, but in the scope of human history, what seems normal to us is actually a very young age. Indeed, the age of menarche has steadily trended downward since the Victorian Era. Here’s a look at the average age throughout history, what influences that age, and some reasons why the downward trend may have started…

5 Unusual Disorders That Seem Too Strange To Be Real

From involuntary natural drunkenness to a condition called “Exploding Head Syndrome,” these are some of the most unusual disorders in the world.

Strange Disorders Brain Body System

Image Source: Flickr

Our brains and bodies are composed of an incredibly complex series of networks and systems, which naturally means that the list of things that can go awry within them is seemingly endless. Here are five disorders of the brain and body that you won’t believe even exist.

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