Danger: Life without vaccine

Vaccines. Gene-modified food. Climate. We're awash in science skeptics. Is this an anti-science mood, or something more complicated? More »

Global warming crisis: One expert’s view

For an overview on warming, we interview the scientist who introduced the “hockey stick” graph showing rapid global warming. Is the More »

Large amounts of methane and carbon dioxide could be produced as warming changes Arctic lands and ocean. Could this start a frightening More »

Think you can get away with an occasional high-fat junk food chow-down? A new study confirms that a single meal can harm your arteries. More »

Vast deposits of a strong greenhouse gas are frozen under the ocean. As the ocean warms, this methane is releasing. How much more More »

Most water pollution originates in polluted runoff. After a near-record number of beach closures, could green infrastructure convert More »

Could soil help? One-third of soils are degraded. In fighting desertification, erosion and nutrient loss, some soil-restoring More »

With three nuclear reactors and three pools of spent fuel teetering on the edge of meltdown, Japanese technicians struggled to throttle More »

What kind of ecological damage can we expect from a sustained blowout in the Gulf of Mexico? More »

When everybody exploits a common resource without limit, we get the tragedy of the commons: Benefiting the individuals burns through More »

Space shuttle Columbia has crashed, raising questions about research on the space shuttle and the International Space Station. More »

What was the long-term impact of the Exxon Valdez spill in Alaska? Did the cleanup help, or make matters worse? Who are you going to More »

Biological weapons are microscopic killing machines containing viruses, fungi or bacteria — or the toxins made by these organisms. More »