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image of three human egg cells inside ovarian follicles
Could aging eggs be 'rejuvenated'? New tool may help pave the way to fertility-extending treatments Scientists invented a new experimental system to study how age-related changes in egg cells make them more prone to chromosomal errors.
Asian woman with white skin, gray hair, sitting with her back, Photo of the back.
Gray hair may have evolved as a protection against cancer, study hints Aging comes with graying hair, which may be a sign of the body lowering its risk of cancer, a study suggests.
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Woman with Insomnia. Young woman lying on bed with hand on forehead.
Insomnia and anxiety come with a weaker immune system — a new study starts to unravel why People with anxiety or insomnia tend to have weaker immunity. The decline of a key immune cell may be a culprit.

Latest about Health

Xiaomi Smart Band 9 being worn by our reviewer

Best budget fitness trackers 2026: Cheap but mighty

By Maddy Biddulph, Anna Gora last updated

Buying Guide These are the best budget fitness trackers you can buy in every category, from Fitbit Inspire 3 and Xiaomi Smart Band 9 to Garmin Forerunner 165.

Buying Guide
The personalized watch face of the Motorola Moto Fit Watch.

Motorola Moto Watch Fit fitness tracker review: The perfect yoga companion

By Kat Bayly published

Review A budget fitness watch that prioritizes personalization for optimum ease of use.

Review
International Space Station as main image, circle superimposed on the image showing a digital illustration of e.coli bacteria.

Viruses that evolved on the space station and were sent back to Earth were more effective at killing bacteria

By Manuela Callari published

Near-weightless conditions can mutate genes and alter the physical structures of bacteria and phages, disrupting their normal interactions in ways that could help us treat drug-resistant infections.

Viruses, Infections & Disease

Why is flu season so bad this year?

By Clarissa Brincat published

Flu season in the U.S. is particularly bad this year, and a new branch of the flu family tree may be to blame.

Flu

This is SPARDA: A self-destruct, self-defense system in bacteria that could be a new biotech tool

By RJ Mackenzie published

A bacterial defense system called SPARDA employs kamikaze-like tactics to protect cells and could be useful in future biotechnologies.

Genetics
Operation Hasbro board game.

How much of your body could you lose — and still survive?

By Lauren Schneider published

Five vital organs are essential for life, but survival is more medically complex.

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Health
Brain surrounded by colorful lines.

'Zombie' cells may drive common form of epilepsy

By RJ Mackenzie published

Scientists are unraveling the role of senescent cells in a common form of epilepsy, and it could point to new treatments.

Neuroscience
Human eye with DNA Helix in Pupil. Abstract geometric illustration on biometrics authentication technology, genetic diagnostic, genealogy research concept by wireframe mesh on blue background

These genes were thought to lead to blindness 100% of the time. They don't.

By Stephanie Pappas published

New research finds that retinal diseases thought to map one-to-one to genetic mutations are more complicated than that.

Genetics

A man's sudden seizures were set off by sudoku

By Sophie Berdugo published

In the weeks following a ski accident, a German man experienced seizures when he completed sudoku puzzles.

Mind

Is there such a thing as 'too much' protein?

By Christoph Schwaiger published

Daily protein requirements vary a bit person to person, but some evidence suggests consuming high amounts of protein could do more harm than good. Live Science spoke to experts to learn more.

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Food & Diet
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