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Genetics

Redback spiders live throughout Australia.

Here’s Why These Male Spiders Sacrifice Themselves by Somersaulting Into Females’ Fangs While Mating

A new study suggest that even strange, complex animal behaviors can have a relatively simple genetic basis

Some modern humans might be taller and more muscular because of a Neanderthal-derived gene variant that affects the growth hormone pathway.

Got a Brawny Build? You Might Be Able to Thank Your Neanderthal Ancestors, According to a New Study

New research hints that some living people inherited a gene variant from Neanderthals that has made them slightly taller and more muscular than their peers

A saber-toothed cat skull found at the La Brea Tar Pits

Spinal Deformities in Saber-Toothed Cat Fossils Reveal How the Now-Extinct Felines May Have Spent Their Final Days

Researchers studied saber-toothed cat vertebrae found in the La Brea Tar Pits in Los Angeles. They identified a surprisingly high number of deformations, including signs of spinal nerve tumors, hinting at a dwindling population suffering the consequences of inbreeding

Previous research hinted at ghost ancestry in our DNA, but the new work helps pinpoint the timeline of when the ancient relatives' genetic material entered our genomes.

Traces of Two Extinct ‘Ghost’ Ancestors Were Found Hiding in Modern Human DNA, Hinting at Our Extremely Complex Family Tree

Researchers used a new method to investigate past interbreeding with Homo sapiens that doesn’t require ancient DNA. The technique identified areas of living humans’ genomes that came from unknown hominins, including one from a 1.8-million-year-old lineage

The experimental therapies are part of a larger movement toward personalized medicine.

After Receiving a Custom Experimental Medicine, a Teen With a Rare Genetic Disorder Walked on His Own for the First Time

The patient’s genetic disorder causes frequent seizures and developmental delays. His progress, along with that of another boy who received a similar personalized treatment, highlights the promise—and challenges—of tailor-made drugs

Handedness refers to both hand preference and hand dominance. 

People Aren’t Born as Righties or Lefties—They Develop Hand Dominance With Practice, a New Study Suggests

Humans do have a biological preference for using one side of their body, which might prime them for using limbs on that side for complex motor tasks like writing—and honing those skills over time

Graves of unidentified soldiers who died at the Battle of Camden

DNA Reveals the Identity of a Teenager Who Died in the Revolutionary War, Cracking a Nearly 250-Year-Old Cold Case

John Pumphrey was still a boy when he enlisted in the Continental Army in 1777. After archaeologists discovered his remains, a genetic genealogy analysis identified 20,000 DNA matches for living relatives

Left: a burial mound in Kazakhstan. Right: the Golden Man's head ornaments.

Kazakhstan’s Iron Age ‘Golden Man’ and Other Elite Scythians of Eurasia Inherited Their High Social Status, Ancient DNA Suggests

Researchers have long wondered whether upper-class members of the ancient nomadic warriors earned their social status through individual achievements or birthright

Microscope images of an artificial cell, colored green, dividing into two

Scientists Say They’ve Made Cells That Feed, Grow and Reproduce, Bringing Them One Step Closer to Building Life From Scratch

The human-made cells show many hallmarks of life, but they can’t make all their necessary internal structures or divide for very many generations

Some of the Neanderthal remains that were analyzed in the new study

Why Did Neanderthals Go Extinct? Inbreeding Probably Wasn’t to Blame for Their Demise in Northwestern Europe, a Study Suggests

In contrast to those who resided in Siberia, Neanderthals who lived in what’s now Belgium and France shortly before the species vanished seem to have been genetically diverse and healthy

Scientists carried out their experiments in the bacterium Escherichia coli. Cells of the species are artificially colored blue in this microscope image.

Scientists Used A.I. to Redesign a Microbe’s Machinery to Function Without a Key Ingredient of Life

Although the researchers did not create an entire cell that could function without a crucial building block, the findings represent a big step in synthetic biology and provide a glimpse at how Earth’s earliest organisms may have lived

Western Australia’s Ningaloo coast

Scientists Detect an Elusive Giant Squid and Many Other Surprising Marine Animals Near Western Australia Thanks to DNA in the Water

Mucus, feces, skin and other shed tissue allowed researchers to investigate which creatures have been swimming in two deep-sea canyons without having to observe or catch them

The exterior of the reconstructed chapel in Historic St. Mary's City, Maryland

Groundbreaking DNA Analysis Identifies 1.3 Million Living Relatives of Colonial Maryland’s Earliest Settlers

Experts compared DNA from 49 skeletons buried in a cemetery in St. Mary’s City to genetic data shared by 11.5 million 23andMe users. They also identified what may be the remains of the colony’s second governor

Gentoo penguins have been considered a rare beneficiary of climate change due to their population growth on the Antarctic Peninsula. Splitting the birds into four species brings to light regional threats and declines.

Gentoo Penguins Are Actually Four Different Species, Scientists Say, Revealing They’re Not Quite ‘Winners’ of Climate Change After All

A new study indicates that the adaptable birds evolved into distinct lineages as isolated populations shifted to match their environmental conditions over time. The work has implications for how conservationists assess threats to gentoos

A chick hatches around 18 days after embryo transfer to the artificial egg, according to the company.

‘De-Extinction’ Company Says It Hatched Chicks From Artificial Eggs, Paving the Way for Resurrecting Dodos and Other Bygone Birds

Colossal Biosciences announced that 26 live baby chickens have emerged from 3D-printed honeycomb structures. But the company does not plan to detail the system in a paper, and its mission has faced criticism

A museum-goer looks at a Vincent van Gogh painting.

New Research

The Relaxation of Regularly Listening to Songs or Drawing Pictures May Actually Slow Cellular Aging, New Research Shows

According to a new study, people who are exposed to art on a weekly basis are about a year younger “biologically” than those exposed only once or twice per year

Indigenous communities in the Andes domesticated the potato between 6,000 and 10,000 years ago.

Potatoes Didn’t Just Feed Ancient Indigenous Communities in the Andes—the Tasty Tubers Also Reshaped People’s DNA

A new study finds that Indigenous Andeans living in what is now Peru have extra copies of a gene called AMY1, which helps the body digest starch

Analysis of a skeleton from an early medieval site

New Research

The Fall of the Roman Empire Was Less a Clash of Civilizations and More an Opportunity to Mix and Mingle, a New Genetics Study Shows

Researchers who analyzed genomes from early medieval graves in modern-day Germany hypothesize that people from the former Roman Empire formed families with Germanic people soon after the empire fell

About 47 percent of wolves in Italy are considered wolf-dog hybrids, according to a recent genetic analysis.

Nearly Half of Italy’s Wolves Are Part Dog Now, Thanks to Hybridization. Is That a Threat to the Species?

Wolf-dog hybrids are growing far more common in Italy, raising scientists’ concerns for the future of the wolves

Microscope image of a cross-section of a mouse nose. The animal was genetically altered so that its nerve cells used for smell glow green. Some dying nerve cells appear red.

Scientists Create the First Detailed ‘Smell Map’ of Odor Sensors in the Mouse Nose—and Sniff Out Some Surprising Discoveries

In two new studies, researchers used genetic techniques to upend a longstanding assumption that nerve cells with scent detectors were randomly arranged. They don’t know whether the same spatial organization is found in human noses

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