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How marijuana rewires the teenage brain

A growing body of research suggests cannabis poses risks to the developing brain

Hantavirus cruise ship, PCOS name change, a fish that hides in another animal’s ‘butthole’

What you should know about hantavirus, why PCOS is getting a new name, and how some fish hide in an unusual spot

Trump administration ousts top NIH infectious disease leaders

Eight of the top 10 officials at the U.S. National Institute of Allergy and Infectious Diseases have now been pushed out since President Donald Trump took office

The programmer whose code underpins the Internet

Sharla Boehm, a math teacher, spent her summers coding. She'd go on to build what would eventually evolve into the Internet

See a Lincoln Memorial-sized asteroid pass within just 56,000 miles of Earth today

The asteroid will swing by Earth on Monday and be close enough to be visible using an amateur telescope

The world is less prepared for a pandemic than before COVID. Here’s why

As world health leaders face deadly outbreaks of hantavirus and Ebola, a major pandemic preparedness report finds we are less safe from viral outbreaks than before COVID

How a Funding Pause Derailed an Artificial Heart for Babies

SIMAR BAJAJ

James Antaki’s efforts to develop a baby’s heart were close to success when his federal funding was cut off. The grants were eventually restored; rebuilding what was lost wasn’t so easy.

Children’s Mental Health Visits Have Shot Up, Research Shows

ELLEN BARRY

Doctor’s visits for children’s anxiety rose by more than 250 percent over 10 years, according to a study of nearly two million children.

How a ‘Model’ for Climate Migration Became a Cautionary Tale

SCOTT DANCE AND WAYAN BARRE

The residents of Isle de Jean Charles in Louisiana found safety after moving to higher ground. But the experience left some of them warning others facing relocation: ‘Don’t do it.’

Hidden copy of the oldest known poem in the English language leaves researchers ‘speechless’

Researchers discovered the copy of the 1,300-year-old poem lurking inside a historical text in an Italian library

How scientists developed a hantavirus PCR test in a weekend

Researchers at the Nebraska Public Health Laboratory worked round the clock to develop a test for the Andes virus at the center of the deadly cruise ship outbreak

When Tornado Weather Hits, These Scientists Break Out the Colored Pencils

JUDSON JONES AND DESIREE RIOS

With a battery of modern technology at their fingertips, meteorologists often turn first to an old-fashioned tracking technique.

E.P.A. to Repeal Some Limits on ‘Forever Chemicals’ in Drinking Water

LISA FRIEDMAN

The rules were established by the Biden administration after research linked the compounds to a range of serious health problems.

Ebola outbreak triggers U.S. ban on travelers from three African nations

At least six Americans are believed to have been exposed to the Ebola virus, and one person who appears to have contracted the virus has been evacuated to Germany