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Scientists now think humans settled South America in three waves.

A New Big Database of DNA From Indigenous Americans Shakes Up Scientists’ Theories About Human Settlement of South America

Genomic data provides evidence for a previously unknown wave of migration, with Indigenous groups living in central and southern Mexico spreading into South America and the Caribbean starting around 1,300 years ago

The federal government is reclassifying medical marijuana as a less dangerous drug.

State-Licensed Medical Marijuana Has Been Reclassified as a Less-Dangerous Drug. Here’s What That Means

The move should make it easier for researchers to study the substance and give tax breaks to licensed medical marijuana dealers

The researchers studied neural activity in 16 participants with epilepsy who had electrodes in their brains.

We Use Many of the Same Brain Cells to See and to Imagine Objects, a Study Suggests. The Findings Provide a New Window Into Memory

While past research has hinted at an overlap in relevant brain regions, the new work drills down to the cellular level. The discovery could help improve treatments for memory disorders, such as dementia, and certain psychiatric conditions, like schizophrenia

The McDougall Creek wildfire burns in the hills of British Columbia, Canada, on August 17, 2023. Evacuation orders were put in place for areas near Kelowna, as the fire threatened the city of around 150,000.

Ancient Humans Mastered Fire. Now, Burning Fossil Fuels and Blazing Landscapes Threaten to ‘Undo the World’

Intensifying wildfires across the continent are spewing air pollution, putting human health at risk, particularly Americans living with chronic illnesses

The hallucinogenic mushroom Psilocybe pelliculosa, which contains psilocybin

How Do Different Psychedelics Affect the Brain? Scientists Analyzed More Than 500 Neural Scans to Find Out

A new study suggests that four psychoactive compounds work in surprisingly similar ways, and that they break down the separation between how we think internally and how we perceive the outside world

The clitoris is larger than most people think, and much of the organ is internal.

Scientists Just Made the Most Complete Map of the Clitoris’s Sensory Nerve Network. Here’s What They Found

Cultural taboos around female sexuality have hindered research on the organ. But a new study provides pivotal insights that can inform important surgeries and health care

Traffic fatalities increased by about 15 percent on major album release days, according to a new study.

On Major Music Release Days, Stay Extra Vigilant While Driving. Car Crash Deaths Seem to Spike When Top Artists Drop New Albums

A new study found a correlation between big album release days and traffic fatalities. While the research can’t prove the new music caused the accidents, the work hints at a major distractor while driving

An artificially colored human B cell, the type of immune cell that caused all three autoimmune diseases in the patient

In a First, This Personalized Cell Therapy Treated Three Life-Threatening Autoimmune Diseases in One Patient

The patient was bedridden and needed daily blood transfusions, and she had tried nine different therapies that didn’t bring lasting effects. So, researchers modified some of her immune cells so they would attack her faulty cells

More than 95 percent of the world’s bergamot oil production is concentrated in Southern Italy’s Calabria region. But harsh conditions driven by climate change threaten that supply.

Earth’s Smells Are Disappearing Because of Climate Change, and It’s a Vast Cultural Loss

A triple threat of pollution, extinction and warming temperatures is altering the way the planet smells. Scientists are only beginning to understand the stakes for humans

Tobacco plants make a lot of the amino acid tryptophan, the basis of many psychoactive compounds.

Scientists Engineered Tobacco Plants to Produce Five Mind-Altering Psychedelic Compounds

The substances have been used by Indigenous peoples for thousands of years, but they’ve recently become popular as possible therapeutics for mental health conditions

Becoming an expert birder might support brain health, according to a new study.

Becoming an Expert Birder Can Reshape Your Brain and Might Help Protect It From Aging, New Research Suggests

Compared with novices, seasoned birders had denser, more structurally complex brain regions involved with tasks like object identification, visual processing, attention and working memory

Researchers stimulated digital replicas of the patients' hearts with electrical signals to locate the sources of their irregular heartbeats.

Doctors Used ‘Digital Twins’ of Patients’ Hearts to Fix Their Irregular Heartbeats

A small clinical trial suggests the technology can help physicians perform life-saving surgeries more efficiently and safely

NASA astronaut Mike Fincke on January 15, when SpaceX Crew-11 splashed down, roughly one month ahead of schedule.

An Astronaut’s Sudden Inability to Speak Prompted the ISS’s First Medical Evacuation. Doctors Still Don’t Know What Caused the Issue

The individual who fell ill, NASA’s Mike Fincke, says the medical team is almost certain that the issue was related to being in space

Male reproductive cells, sperm, might struggle to reach and fertilize female reproductive cells, eggs, in microgravity, according to a new study.

Humans Might Struggle to Make Babies in Space. Sperm Gets Disoriented in Microgravity, a New Study Suggests

Simulated near-weightless conditions reduced human sperm’s navigational abilities

Ball pythons (shown), along with Burmese pythons, were studied in the new research.

Could Python Blood Lead to the Next Generation of Weight-Loss Drugs?

Researchers discovered an appetite-suppressing molecule in python blood. If one day turned into a medication, it might lack some of the common negative side effects of GLP-1s

The new variant has been detected in 25 states so far.

The ‘Cicada’ Variant of Covid-19 Is Spreading in the United States. Here’s What You Need to Know

Infection levels are still low in the country, but the highly mutated variant might be able to evade your body’s immune defenses acquired via vaccine or past infection

Researchers gathered bark from two species of trees—downy birch and silver birch—on public land in Germany. Then, they used it to produce birch tar via three extraction techniques.

New Research

Did Neanderthals Use Birch Bark Tar as an Antibiotic to Treat Wounds and Infections?

Scientists created samples of the black resin using three methods and tested their effectiveness against two common bacteria

Sharks in the Bahamas, including the Caribbean reef sharks, are ingesting drugs, a new study suggests.

Sharks in the Bahamas Test Positive for Drugs, Including Cocaine and Painkillers, in a New Study

Around one-third of the studied sharks had detectable levels of the analyzed drugs in their blood

While the cells can play the game, they’re not very good at it.

A Clump of Human Brain Cells on a Computer Chip Learned to Play the Nostalgic Video Game ‘Doom’

The technology could one day help researchers develop drugs and tailor treatments to individual patients

The perception of sleep is just as important as the quality of sleep.

Vivid Dreams Might Be Key to Feeling Well Rested When You Wake Up, According to a New Study

The findings could help explain the purpose of dreams and help physicians better treat people with sleep disorders

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