Fitness

Some researchers suspect these bacterial ancestors living within our cells may contribute to a wide range of neurological and psychiatric disorders

You have 86 billion of them inside you, but do you understand how hard it was for us to learn that?

Some two billion people don’t get enough of this essential mineral in their diet

A newly discovered internal body clock creates annual peaks and valleys

Achieving better, more equitable treatments requires looking at multiple factors that affect populations differently, including genetic variations

Blood and the gut dominate cell turnover

Video produced in partnership with The Great Courses. All Great Courses video content is available only to subscribers with the password sent via email.

The catchall term plays into a cultural notion that estrogen is what makes a woman a woman

A likely culprit is hormone-disrupting chemicals

People are aging better but not across the board. Education makes a dramatic difference

Scientists have created an atlas of cardiac cells in six regions that could help chart what goes awry in heart disease

We wrap up our preelection series with Scientific American senior editor Jen Schwartz, who talks about the possible effects of the election results on technology development and use.