Short-wave ultraviolet radiation can clear dangerous germs from hospital rooms.
Killer whale moms live long past menopause, apparently to support and protect their adult sons.
Deforestation can lead to droughts hundreds of miles away.
Populations of ocean bacteria have a few designated fighters, which release antibiotics that don't harm their own community.
People living as hunter-gatherers burn roughly as many calories per day as those in industrialized countries.
Strategically placed grass, ivy, and other greenery can significantly improve air quality in urban centers.
Lyme disease correlates with the waning fox population, not an increase in deer.
“Smart” headlights improve visibility by illuminating the road ahead, but not raindrops or snowflakes.
Men that sire children later in life may pass on an advantage to their grandchildren.
Mice that eat only during certain hours avoid obesity and related health problems—even on a high-fat diet.
The antidepressant Zoloft affects cell membranes in yeast, which lack the brain chemical the drug targets.
Eliminating bears, wolves, and other top predators has far-reaching consequences.
Taking antibiotics early in life can lead to asthma, according to a study in mice.
Fossilized raindrop impressions, preserved for 2.7 billion years, may reveal new information about Earth's history.
New research adds 2 more rare blood type systems to a surprisingly long list.
A rare genetic mutation makes people very short, but also resistant to cancer and diabetes.
Hear how nematode worms have a surprisingly complex communication system.
Hear how the perception that women are scarce may make men less careful with their money.
The planet Mercury seems placid compared to others in the solar system. But the MESSENGER spacecraft is revealing a more tumultuous past.
Statisticians test whether famous musicians are really more likely to die at age 27.