Men and women didn't evolve to perform segregated hunter-gatherer duties

The evolution of the human diet

Could eating like our ancestors make us healthier? One estimate suggests prehistoric hunter-gatherer communities obtained 75% of their calories from meat and fish.

Three examples of how humans are still evolving

For much of nature, natural selection and "survival of the fittest" still play a dominant role; only the strongest can survive in the wild. As little as a few hundred years ago, the same was true for humans, but what about now?

Scientists have not yet answered what the evolutionary benefit may be of menopause

Few animals are known to experience menopause, raising questions about why it would be evolutionarily advantageous to have women survive past their reproductive years. One leading hypothesis is the grandmother hypothesis—older women and other species known to experience menopause, like whales, can aid families and pass down knowledge to future generations.

Did agriculture give rise to inequality?

This article explores how economic and social inequality relates to the rise of agriculture. About 10,000 years ago, some hunter-gatherers started farming, launching what came to be known as the Neolithic revolution. Hunting and gathering allowed...

Why are there as many males as females?

Pretty much every species breaks down with an equal sex-ratio, with roughly the same number of males as females. But on the surface, it appears that most species wouldn't need many males to keep the population growing, with their energy-efficient, abundant sex cell production. So why is it equal? Scientists argue an equal ratio is the most evolutionarily stable. Learn about this quirk of biology here.

Why portraits of Neanderthals vary so drastically

Neanderthals, humanity's long-lost genealogical cousins, are often portrayed as bumbling, hairy, cave-dwelling misogynists. But other efforts show tall, dignified creatures not too different from contemporary people. This article explores why most visual interpretations of Neanderthals are more in the service of social or political beliefs instead of science.

Scientific advances have transformed understanding of Stonehenge’s builders

Techniques such as radiocarbon dating, DNA analysis, and isotopic testing have revised scholars' understanding of Stonehenge. This article presents evidence suggesting that societies were more cooperative and less violent than earlier theories had suggested.

The Greeks weightlifted using massive stones—but viewed muscles differently

Ancient Greek art is replete with humans with muscular physiques, but there is very little evidence they knew much about proper weightlifting. There are just a few stones with inscriptions hinting at their weightlifting use. This article exposes some of our modern assumptions about muscle development, suggesting the Greeks thought differently about strength than we do today.

Optimal human functioning requires movement

There is now ample evidence to back the centuries-old hypothesis that exercise is critical to human health. This review article explores the latest discoveries in exercise science, including how exercise is intrinsic to maintaining our organ systems throughout life.

Women's health research continues to be underfunded

Health conditions that affect women more than men get less research funding. This interactive collection of graphs details the gendered gap in health research funding. Of the conditions that affect one sex more than another, those that create the...

'Men's groups' seek to offer deeper authenticity and personal growth

These formalized gatherings of men involve meaningful check-ins and sharing of daily experiences with the goal of personal growth. They are typically founded with the intention of bringing together men who want to examine their life and relationships, seek personal growth, and explore their ongoing relationship with masculinity and manhood.

Matrilineal societies—where women led households—were common among Northeastern natives

Such societies also viewed women as leaders in spiritual matters. Both men and women held political roles as clan leaders and worked in tandem with an advisory council.

Divorce reportedly existed in hunter-gatherer societies

Though divorces have been around for centuries and have become increasingly common, they can still be perceived with hints of shame. Historian Stephanie Coontz advises readers that the good old days of marriage may have been just as bad as today, considering its prevalence throughout history.

One researcher posed a theory that aliens played a significant role in human evolution

Researcher Zecharia Sitchin proposed that Sumerian cuneiform tablets revealed that Sumerian gods were aliens who landed on Earth in Mesopotamia and influenced the creation of modern humans. While his ideas gained cultural interest, they are widely rejected by mainstream scholars.

Herd behavior has been seen in 193-million-year-old dinosaur fossils

Scientists excavated eggs, juveniles, and adult remains in Patagonia, all arranged by age group. The organization into structured groups may have contributed to evolutionary success by consolidating eggs in one location to make defending them easier.

Why Men's Legs Were Everything

From codpieces to cotton hose, here's the surprisingly loaded history of men's legs, and why 18th-century Europe couldn't stop staring at them.

The warrior women of Ancient Scythia who inspired the Greek Amazons

Greek literature regales readers with tales of Amazon queens and warriors going toe-to-toe with heroes, including Achilles and Hercules. This article explores why these female warriors were relegated to myth. For a long while, it was believed that these stories about all-female warriors were just stories. But scientists have since found evidence that these ancient warriors were part of the nomadic tribes of Scythia, and more discoveries are expected.

The anthropological origins of modern race science

The year 1961 saw the launch of The Mankind Quarterly, a new scientific journal of anthropology that hid its political propaganda behind a veneer of academia, expecting readers to assume whatever lay in its pages was scientifically proven. This in-depth article details how this journal pushed race science in the hopes of blocking racial integration in the US and preventing the immigration of those outside of Western Europe.

Twin studies helped scientists understand why mosquitoes like some of us more than others

A combination of carbon dioxide output, skin chemistry, genetic factors, hormones, and clothing choice can make us particularly vulnerable to mosquito bites. Watch how mosquitoes responded to one man in the video versus his wife, a research approach typically conducted with identical and fraternal twins to test mosquito attractiveness.

Heatstroke treatment guidelines were built almost exclusively on research in men

Protocols for the standard treatment recommendation for heatstroke—whole-body cold water immersion—were built based on studies almost entirely in men. The research wasn't replicated in women, who typically cool faster than men during cold water immersion, raising questions about standard protocol safety for women, due to the risk of overcooling.

'Pac-Man' was the rare early video game aimed at both men and women

The early arcade games were mainly aimed at boys and young men, with a focus on sports and violence. Toru Iwatani was interested in appealing to a wider audience and created "Pac-Man," released in Japan in 1980.

Tennis' weirdest rule (only for women)

At all but one Grand Slam, men and women played with the same tennis ball. But at the US Open, women were required to use a different ball until a change was made a few years ago. We break down the story behind that strange anomaly.

How to carry more than your own bodyweight

Those images showing a villager carrying an enormous bundle on their back, or balancing a basket of fish on their head—how's that possible? This article dives into the clever tools and habits of strength training some cultures employ as part of their labors, from the springy bamboos used by Vietnamese farmers to the headbound burdens of Himalayan sherpas.

Visualizing how American men and women spend every hour of the day, by decade of life

Drawing on three years of Census time-use data, the tool tracks 12 activities—sleep, work, housework, caregiving, TV, and more—across age groups from the 20s through 70s. One persistent gap: women spend 45 more minutes per day on housework than men on average.

Adams' famous 1776 letter urged the Founders to 'remember the ladies'

In a March 1776 letter to John, Adams urged the Founders not to grant husbands unchecked power over their wives. Historians note it was not a demand for suffrage but a challenge to coverture—the legal doctrine that denied a married woman an independent identity.

Larger animals like giraffes, elephants, and blue whales have developed a unique defense against cancer, a phenomenon known as Peto's Paradox

At the beginning of the 20th century, a group of young men ate standard American food—replete with food additives like borax and formaldehyde—as part of government research to better understand food safety.

Watch how algorithms can be designed to train themselves and self-improve without human input, to the point where the optimized code is too complex for programmers to understand.

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

In 2018, 26-year-old missionary John Allen Chau was killed by tribesmen after attempting to reach and evangelize on India's isolated North Sentinel Island

Listen to an in-depth conversation on the links between Parkinson's disease and herbicide exposure and the challenging pace of scientific investigation.

The first line of 'immortal' human cells, which can divide indefinitely and are used in scientific research, was nonconsensually taken from a Black woman.

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

Recent research found that the brain doesn't seem to massively rewire following amputation—upending earlier beliefs about the cause of phantom limb pain.

Fear or disgust related to clusters of holes and cracks, called trypophobia, may stem from evolutionary processes to help us avoid pathogens.

Georgia O'Keeffe's flower paintings are often assumed to be sexual, though the artist claimed she was simply interested in highlighting the beauty of flowers that most people neglect

The Brothers Grimm were lawyers before they were storytellers, but became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

How the most famous Ebola book, The Hot Zone, which sold 3.5 million copies and was translated into 30 languages, got aspects of the disease so wrong.

While the sun's gravity keeps the planets in orbit, their gravity also pulls on the sun, causing it and everything else in the solar system to orbit around a mutual balance point called the barycenter—the true center of the solar system.

The identity of the Tank Man in the iconic photo from the 1989 Tiananmen Square protests remains unknown and was possibly killed.

Apollo astronauts left items in the moon's 'toss zone,' including golf balls, family photos, and bags of human waste, to make room for lunar rocks.

Trace how the Bill of Rights, inspired by centuries of political theory, took shape between 1774 and 1789.

Explore an interactive map built from more than 100,000 survey responses on where people find joy in their lives

To reduce wrinkles in clothing, research recommends gentle wash cycles with more water and tumble drying with smaller loads and longer times.

Hedge funds, the private investment firms that trade a wide swath of financial assets, make money by imposing steep fees on investors and from the fund's investment performance.

Explore chaos in this simulation of two double pendulums, where small differences in the release angles produce wildly different outcomes.

Many legends about George Washington, including his supposed wooden teeth and the story of cutting down the cherry tree, lack evidence.

While El Niño moves warm Pacific Ocean waters east along the equator, La Niña moves them west, shifting where rainfall will become more common for months.

Pure water does not conduct electricity because this flow of energy requires the movement of charged particles, and water is a neutral molecule.