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A young grizzly bear climbs over a highway guardrail.
Food & Environment

Getting along with grizzly bears

In rural Alaskan and Canadian communities, reducing conflict between people and their wild neighbors means both species must change their behavior

Three panels show a cow, a chicken and a woman, with viral particles moving from each animal to the woman.
Health & Disease

Everything you need to know about bird flu

How dangerous is it? Where did it come from? H5N1 influenza’s origins stretch back to the 1990s, and key events paved the way for the outbreak we’re seeing today.

Illustration of a woman shows a primary tumor in breast that has spread to other body parts.
Health & Disease

How cancer cells travel to new tissues and take hold

Understanding these astonishing migrations through the human body, known as metastases, could suggest novel treatments

Aerial photograph of solar panels and sundry huts set among vegetation.
Technology

For climate and livelihoods, Africa bets big on solar mini-grids

Nigeria is pioneering the development of small, off-grid solar panel installations to bring reliable electricity to remote communities — setting a model for other African countries

Nine human silhouettes are depicted as tiled mosaics with patches of darker and lighter colors.
Health & Disease

We are all genetic mosaics

Picture your body: It’s a collection of cells carrying thousands of DNA errors accrued over a lifetime — many harmless, some bad, and at least a few that may be good for you.

Silhouette of a person pinching their forehead in pain.
Health & Disease

Studies of migraine’s many triggers offer paths to new therapies

One class of drugs has already found success in treating the painful, disorienting and common attacks. Excitement is building about a slew of additional drug targets.

Aerial image showing an arid terrain, with green bushes and, in the middle, a body of water known as the Quitobaquito spring. The terrain is traversed from side to side by a wall, preventing access to the spring from the southern side.
Food & Environment

Nature interrupted: Impact of the US-Mexico border wall on wildlife

Scientists on both sides of the border are working to understand how the barrier is affecting the area’s biodiversity. Meanwhile, communities try to save animals left without access to water.

In a cartoon, an assortment of people — young and old, male and female — queue for a restroom, waiting to relieve their full-to-bursting bladders.
Health & Disease

To pee or not to pee? That is a question for the bladder — and the brain

How do we sense the need to urinate? The basic urge is surprisingly complex and can go awry as we age.

Scientists in lab coats with oxygen tanks are floating in an enlarged blood vessel, where they point at and take notes about large spherical particles around them.
Health & Disease

All about cholesterol

The latest science on how blood levels of HDL, LDL and more relate to cardiovascular health

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