In 2000, the ozone hole was at its largest. Read on for more facts about the ozone hole.
How green are aerosol cans now, with chlorofluorocarbons out of the picture?
Some answers from an atmospheric scientist
Air: It's one of the world's most important, least understood, and possibly life-saving substances
Worms, planets, extra dimensions: just a few of the things that inspire the most creative young scientists of the year
A new theory of anthropogenic climate improvement
A bacterium inside the coffee berry borer could provide clues as to how to fight it
The idea that Viagra helps out athletes has been around for years now, but is there a scientific consensus on it?
The best long-form stuff we read this year
Your LaCroix can't kill cockroaches. Or you.
In his lab far from the scene of a crime, Skip Palenik forges unbreakable chains of evidence from dust & detritus. Let's watch the master at work.
Information about how terrible drugs and alcohol are for your health doesn't seem to be an effective deterrent, a new study says.
A new study finds that trees are fueling air pollution--with a lot of help from humans
A new study suggests an oily pate may lower ozone levels; but is the alternative any healthier?
From our archive: a reporter's LSD trip, a guide to getting high during Prohibition, and more
We'll get a vaccine for addiction, debate the future of nuclear power, use new tech to take on water shortages, and-just maybe-find an extra dimension or two. Happy New Year
For the first time since the 1970s, researchers are being allowed to study the potential medical properties of the most tightly controlled substances around. But it's not easy.
Snake Venom Reflects More Than 100 Million Years of Evolution
The algae systems can capture most of the phosphorus and nitrogen in runoff
Harvard has a world-class trove of valuable astronomical data. But it's in the form of half a million glass photographic plates