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an illustration of men and women with their brains superimposed over the heads
Is there really a difference between male and female brains? Emerging science is revealing the answer. Brain scans, postmortem dissections, artificial intelligence and lab mice reveal differences in the brain that are linked to sex. Do we know what they mean?
A close-up of a doctor loading a syringe with a dose of a vaccine
'Vaccine rejection is as old as vaccines themselves': Science historian Thomas Levenson on the history of germ theory and its deniers Live Science spoke with author Thomas Levenson about his new book on the history of germ theory.
An illustration of colorful lines converging to make the shape of a human iris and pupil
Scientists hijacked the human eye to get it to see a brand-new color. It's called 'olo.' Using an experimental technique called "Oz," researchers stimulated the human retina such that people saw a brand-new color.

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

Buying Guide These are the best Garmin watches you can buy in every category, from Fenix 8 and Forerunner 965 to Venu 3.

Buying Guide

'How could it have been allowed to happen?': The threat of 'superbugs' was known from the first antibiotic, but we've failed to stop it.

By Thomas Levenson published

Book "What are sometimes called superbugs — microbes resistant to every available drug — are not merely the stuff of nightmares. They are taking lives right now."

Book
A group of women riding on exercise bikes in the gym

Best exercise bikes 2025: From budget options to premium smart bikes

By Sam Hopes, Anna Gora last updated

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

Buying Guide
A woman jogging in a park is checking her running watch

Best running watches 2025: Our top picks for every runner

By Lloyd Coombes last updated

BUYING GUIDE These are the best running watches in every category, from Garmin Fenix 8 to Apple Watch Series 8 and Coros Pace 2.

BUYING GUIDE
A woman holding a water flosser

Best water flossers 2025: Top 6 oral irrigators from Waterpik, Bitvae and more

By Joanne Lewsley last updated

BUYING GUIDE These are the best water flossers you can buy in every category, from Waterpik Ultra to Oclean W10 and Spotlight Oral Care.

BUYING GUIDE

Colors are universal — even if our perception of them is subjective

By Elay Shech, Michael Watkins published

Opinion An object's color appears differently under different lighting and against different backgrounds — for different viewers. But that doesn't mean colors are subjective.

Opinion

Are women less sensitive to anesthesia than men?

By Sahas Mehra published

Some, but not all, research suggests that more women recall events that happened under anesthesia than men do, and that women wake up from anesthesia faster than men.

Surgery

Climate change is spoiling food faster, making hundreds of millions of people sick around the world

By Sanket Jain, Yale Climate Connections published

The World Health Organization estimates 600 million people a year already suffer from foodborne illnesses.

Viruses, Infections & Disease
a woman clutches her belly in pain

What are ovarian cysts?

By Jess Thomson published

Ovarian cysts are fluid-filled sacs that form on or inside the ovaries for a variety of reasons. Often, they disappear on their own, but sometimes, they can grow very large, burst or cause an ovary to twist.

Fertility, Pregnancy & Birth
A variety of running shoes are displayed in a shop under warm downlights

How are scientists making running shoes more sustainable, while still maintaining performance?

By Lou Mudge published

References Can running shoes ever be sustainable?

References
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