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Close-up picture of a Tibetan woman looking into the distance. She is carrying a baby in a shawl on her back. The background of the image is blurry.
Natural selection is unfolding right now in these remote villages in Nepal Physiological traits that help Tibetan women survive at high altitudes are being selected for within the population, meaning they may be becoming more common, new research hints.
A close-up of chickens in an industrial farm
Bird flu could become deadlier if it mixes with seasonal flu viruses, experts warn As of now, 17 states have reported H5N1 bird flu cases in humans, but there is still no evidence for transmission between people. Could that change?
photo of a woman's hands holding a large table-top alarm clock and adjusting the time
The case against daylight saving, from a neurologist and sleep expert While that "extra" hour of sunlight in the evenings can be exhilarating, it comes with significant health trade-offs.

Latest about Health

A 3D rendering of a neuron

'Tour de force' study may explain why trauma can lead to PTSD

By Marianne Guenot published

Stress can shape how memories are formed, a study in mice suggests. The findings could point the way to future treatments for PTSD and anxiety.

Memory
a woman works in a laboratory

Severe COVID-19 may shrink cancer tumors, early data suggest

By Julie Goldenberg published

Immune cells produced during severe COVID-19 infection may shrink tumors. The unexpected mechanism offers a new therapeutic possibility for advanced and treatment-resistant cancers.

Viruses, Infections & Disease
A woman riding one of the best exercise bikes at home

The 7 best exercise bikes for home use in 2024

By Sam Hopes last updated

Buying Guide These are the best exercise bikes you can buy in every category, from Peloton Bike and YOSUDA Bike to Schwinn IC4.

Buying Guide
a color-coded picture of an AQI graph

What is the Air Quality Index?

By Joanne Lewsley last updated

REFERENCE What is the Air Quality Index and what exactly does it refer to?

REFERENCE
A close-up picture of someone vacuuming a mattress

How to get rid of dust mites

By Maddy Biddulph last updated

Reference Learn how to get rid of dust mites with these allergist-approved tips.

Reference
A gloved hand holds a petri dish marked "Avian flu" on a table with other lab equipment

Teen sickened with Canada's first human case of bird flu is in critical condition — and the source remains a mystery

By Stephanie Pappas published

A teenager in Canada is critically ill with the country's first human case of H5N1 bird flu. Health officials aren't sure how the youth was exposed.

Viruses, Infections & Disease
Air purifier vs essential oil diffuser: Image shows oil diffuser mist

Air purifier vs essential oil diffuser: What's the difference?

By Katie Treharne last updated

REFERENCE We pit air purifiers against essential oil diffusers to get a sense of the differences.

REFERENCE
an illustration of Streptococcus bacteria

Necrotizing fasciitis: The 'flesh-eating' infection that bores holes in the body

By Emily Cooke published

Necrotizing fasciitis is a rare, life-threatening illness caused by bacteria that aggressively attack the soft tissue of the body.

Viruses, Infections & Disease
A close-up of wisdom teeth extracted after surgery

Diagnostic dilemma: A man's brain started bleeding after a dentist appointment

By Nicoletta Lanese published

A man's brain started bleeding just after he got teeth pulled at the dentist's office. Why?

Health
An illustration of a flu virus

Canada reports 1st local case of H5 bird flu

By Nicoletta Lanese published

A teen in Canada may be the first person to catch an H5 bird flu virus within the country. Health officials are now working to confirm the diagnosis.

Flu
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