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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 man on a hiking trail in the mountains is checking his smartwatch

Best Garmin watches 2025: Our top picks for outdoor and fitness enthusiasts

By Andrew Williams, Anna Gora last updated

These are the best Garmin watches you can buy in every category, from Fenix 8 and Forerunner 965 to Venu 2 Plus.

Exercise
A humidifier sitting among indoor plants

Best humidifiers 2025: Banish dry air from your home

By Sarah Finley last updated

Buying Guide These are the best humidifiers you can buy in every category, from Dyson AM10 and Levoit LV600HH to HoMedics TotalComfort Deluxe.

Buying Guide
A dehumidifier standing in a living room

Best dehumidifiers 2025: Fight damp, mold and condensation

By Joanne Lewsley last updated

BUYING GUIDE These are the best dehumidifiers you can buy in every category, from Honeywell TP50WK to LG Puricare.

BUYING GUIDE
A white duck with an orange beak is shown perching on a rock.

US reports 1st outbreak of 'highly pathogenic' H5N9 virus in poultry. Should we worry?

By Emily Cooke published

Nearly 119,000 birds have been culled at a farm in California after a bird flu called H5N9 was detected among the poultry.

Flu
A woman itching her arm

It's tough to resist scratching an itch — and evolution may be to blame

By Skyler Ware published

A new study conducted in mice suggests that, although it's not all good, our urge to scratch at itchy skin may have an evolutionary benefit.

Health
A man stands in the sun, squinting and blocking the sun with his hands

Can your eyes get sunburned?

By Margaret Osborne published

Photokeratitis, or eye sunburn, can happen at any time of the year.

Health
A pregnant woman at a doctor's appointment looks worried

Infant mortality is on the rise in the US — experts point to stricter abortion laws as reasons why

By Almut Winterstein, Sonja Rasmussen published

The new study reinforces warnings from doctors about abortion laws with limited or no exceptions.

Fertility, Pregnancy & Birth
A photograph of a person holding two Journavx pain relief tablets.

FDA approves 1st new class of opioid-free painkillers in over 20 years

By Patrick Pester published

The FDA has approved Journavx, an oral medication for treating pain that doesn't target the brain like addictive opioids.

Medicine & Drugs
A close-up of the tip of a nasal spray bottle

FDA approves ketamine-like nasal spray for depression — here's everything you need to know

By Emily Cooke published

A nasal spray that contains esketamine — a potent derivative of ketamine — can now be taken on its own to treat adults with severe depression, the FDA says. Here's what that means.

Medicine & Drugs
Expressive bald man with healthy skin shows ability to wiggle ears having fun on light blue background in room extreme closeup

'Vestigial' human ear-wiggling muscle actually flexes when we're straining to hear

By Clarissa Brincat published

A mechanism that activates specific muscles in our ears is a leftover from our evolutionary past, back when our ancestors depended more on their hearing for survival.

Anatomy
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