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an illustration of a sperm entering an ova
Sperm cells carry traces of childhood stress, epigenetic study finds Fathers exposed to high stress in childhood had different epigenetic markers that may affect their offspring, though more research is needed.
A female black widow spider (Latrodectus), hanging upside-down in her web, showing the red hourglass marking.
Diagnostic dilemma: A woman injected herself with venom from a black widow spider Most exposures to black widow spider venom are accidental, but in a rare medical case, the exposure was intentional.
An illustration of tuberculosis bacteria
Massive tuberculosis outbreak sickens dozens in Kansas An ongoing tuberculosis outbreak in two Kansas counties has sickened dozens since January 2024.

Latest about Health

A close up on a woman's bicep as she's flexing slightly

How many more calories does muscle burn than fat?

By Kamal Nahas published

There's an idea that larger muscles burn a lot more energy while at rest. But is that true?

Anatomy
A photo of three friends drinking alcohol together

How does alcohol cause cancer?

By Clarissa Brincat published

Research suggests that alcohol causes cancer through at least five different mechanisms.

Alcohol
A picture of a street whereby houses are burning as a result of wildfire smoke. Grey and black smoke can be seen covering half of the image.

LA wildfires: How can wildfire smoke affect your health?

By Emily Cooke published

Experts lay bare the health effects of breathing in wildfire smoke and the steps that can be taken to reduce one's risk.

Viruses, Infections & Disease
A picture of Paul Karason sat on a sofa while being interviewed on TV.

Argyria: The rare disease that turns people blue

By Emily Cooke published

Argyria is caused by a buildup of silver in the body, which discolors the skin.

Viruses, Infections & Disease
a child sticks out their tongue with a red candy gummy on it

FDA bans red dye No. 3 in food

By Nicoletta Lanese published

The FDA will no longer allow red dye No. 3 in foods or ingested drugs, citing evidence that high doses of the dye can cause cancer in male rats. There is no evidence it's carcinogenic in humans.

Food & Diet
Our reviewer wearing a Fitbit watch

Best Fitbit 2025: Track your fitness with our best Fitbits

By Lloyd Coombes last updated

BUYING GUIDE The best Fitbit wearables available to buy: Tried and tested to provide you with options from simple fitness trackers to feature-packed smartwatches.

BUYING GUIDE
Two female friends running together in a forest – they are looking at each other and smiling wide. The lady on the left has her dark blonde hair up in a ponytail and is wearing a dark gray sports bra with white straps, gray leggings and a fitness watch on her left arm. The lady on the right has tightly cured brown hair and is wearing a pink and red chevron-patterned sports bra, navy blue leggings and a white fitness watch on her left arm.

Best sports bras for running 2025: top picks from Under Armour, Sweaty Betty and more

By Alice Ball last updated

Buying guide The best sports bras for running can protect and support you through a workout. Here are our top picks, tried and tested.

Buying guide
Close up of a young blonde woman, covered in perspiration, frowning, tense and nervous - tinted red.

Diagnostic dilemma: A woman started sweating blood from her face and hands

By Christoph Schwaiger published

A 21-year-old woman was admitted to the hospital after she was bleeding from her face and palms, with no obvious cause.

Health
Microscope image of an adenocarcinoma in the pancreas. Cancer cells can be seen in dark pink and purple concentrated in a blob in the center of the image. Normal cells can be seen in purple dotted about around it with white gaps in the image where no cells are present.

The 10 deadliest cancers, and why there's no cure

By Ashley P. Taylor, Emily Cooke last updated

The deadliest cancers aren't necessarily the ones that kill the most people overall; they're the ones with the lowest survival rates.

Cancer

Woman's sudden hearing loss turned out to be a tick lodged in her ear canal

By Pandora Dewan published

The tick was found lodged in the skin of her left ear canal after a thorough examination by her doctors.

Viruses, Infections & Disease
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