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What is type 5 diabetes? Newly recognized form of the disease gets name First spotted decades ago but largely forgotten, a newly named form of diabetes stems from undernutrition and is thought to affect millions.
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a close-up of a smiling man's mouth
Mysterious chunks of DNA called 'inocles' could be hiding in your mouth Researchers have discovered giant DNA structures in oral bacteria, and data hint they could influence the function of your immune system.
Health workers unload a patient from an ambulance outside a hospital
'The Big One' could be even worse than COVID-19. Here's what epidemiologist Michael Osterholm says we can learn from past pandemics. The new book "The Big One" describes lessons learned from past pandemics and how they might be applied to mitigate the dangers of future outbreaks.

Latest about Health

Has America's obesity rate plateaued?

By Stephanie Pappas published

Some recent national numbers suggest the obesity rate has plateaued or even declined. Experts are skeptical.

Health
Two women are resting between exercises while sitting on a park bench outside and looking at their fitness trackers

Best fitness trackers for beginners 2025: From Apple Watch to Garmin Forerunner 165

By Lloyd Coombes last updated

Buying guides These are the best beginner-friendly fitness trackers you can buy in every category, from Apple Watch and Garmin Forerunner 165 to Amazfit Active

Buying guides
Our expert reviewer testing the workout features on the Garmin Fenix 8 smartwatch

Best fitness trackers 2025: From smart rings to multisport GPS watches

By Andrew Williams, Anna Gora last updated

Buying Guide These are the best fitness trackers you can buy in every category, from Amazfit Balance and Garmin Fenix 8 to Whoop MG.

Buying Guide
RFK and a mound of ants

Turmoil at the CDC, NASA's comet 3I/ATLAS image release, and the insect apocalypse.

By Ben Turner published

Science news this week Nov. 22, 2025: Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the weekend.

Science news this week

Are free radicals really that bad for you?

By Victoria Atkinson published

Free radicals are highly reactive molecules that are missing an electron. They get a bad rap, but could they actually have any benefits?

Health
An orange cat sitting on a sofa next to an air purifier

Best air purifiers for allergies 2025: Breathe easy this winter

By Molly Cleary, Anna Gora last updated

BUYING GUIDE These are the best air purifiers for allergies you can buy in every category, from Levoit Core 600S and Molekule Air Pro to RabbitAir A3.

BUYING GUIDE
An orange cat standing on top of an air purifier

Best air purifiers for pet owners 2025: Remove pet dander, hair and odors

By Tantse Walter last updated

Buying guides These are the best air purifiers for pets, from Levoit Vital 200S and AirDoctor AD3500 to SwitchBot Table Air Purifier.

Buying guides
A close-up picture of our reviewer wearing the Coros Pace Pro watch

We went hiking with the Coros Pace Pro sports watch — It's surprisingly good

By Anna Gora published

Reviews We liked having the Coros Pace Pro as our hiking companion, but we do not think this sports watch will be our go-to option for extreme outdoor explorations.

Reviews

Slaying 'zombie cells' in blood vessels could be key to treating diabetes, early study finds

By Elise Ceyral published

Clearing aged cells from blood vessels could help reduce inflammation, improve blood sugar levels and counter insulin resistance, a mouse study finds.

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Diabetes

'I don't know if CDC will survive, to be quite frank': Former CDC officials describe the disintegration of the agency under RFK

By Nicoletta Lanese published

Three former CDC officials share their experiences at the agency leading up to their resignations.

Health
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