A quarter of the world's mammals are threatened with extinction, an international survey showed on Monday, and the destruction of habitats and hunting are the major causes.

What we haven’t paid close enough attention to is the fact that there haven’t been enough good paying jobs to sustain an adequate standard of living.

California’s latest initiative on climate change will help reduce global greenhouse gas emissions. Even more progress would be made if others follow.

In the last few decades, there have been surprises on each side of the energy debate.

Three economists suggest questions they would most like to hear John McCain and Barack Obama answer in tonight’s presidential debate.

Four new books illuminate the confluence of science, art and ornithology.

A new study suggests that free drug samples provided in doctors’ offices, a marketing tool, do little to help poor patients and may present health risks for children.

The urge to punish is more than Wall Street loathing: it’s based in instincts that have had a protective effect on communities throughout human history.

As the Web becomes a more social place, media companies are trying to make it easier to share links, add comments to articles and extend online identities.

As Lehman pleaded for a bailout, it approved millions for its executives, a Congressional committee was told.