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A controversial new research paper in Science magazine says Hurricanes Katrina and Rita helped build new coastal wetlands. The report concludes that big storms -- rather than rivers -- are the main source of new material for the marshlands that help protect the coast.

Is life toxic? Award-winning paleontologist Peter Ward thinks it is and has put forth a provocative theory about the unhealthy relationship between humans and other life forms and the planet in his new book The Medea Hypothesis: Is Life on Earth Ultimately Self-Destructive?

A White House panel of independent space experts says NASA's return-to-the-moon plan just won't fly. The expert panel estimates it would cost about $3 billion a year beyond NASA's current $18 billion annual budget.

In Texas last year, 45,200 student athletes were tested for steroids under a tough new program for high schools. The most frequently tested were football players. Only 19 athletes tested positive. Some say that's proof that the testing deters kids from using drugs, while others say the program is flawed.

President Obama will visit New Orleans Thursday to review recovery efforts more than four years after Hurricane Katrina. Residents say much of the city remains in survival mode. But by most accounts, the pace of recovery has improved under the Obama administration.

Oregon Gov. Ted Kulongoski has a long record of environmentally-motivated legislation during his political tenure. He tells us why climate change policy is so important to him, how West Coast states

An outbreak of salmonella is forcing McDonald's and other chain restaurants to stop serving tomatoes. It's not certain that tomatoes are the source of the problem, which left more than 100 people sick in more than a dozen states — but a process of elimination has focused scrutiny on raw tomatoes.

As dean of Harvard Law, Supreme Court nominee Elena Kagan had to reconcile the conflict between the military's "don't ask, don't tell" policy and Harvard's anti-discrimination policy with respect to military recruiters on campus. While she never barred the military from campus, Kagan called its policy on gay service members a "moral injustice."

In the history of the world, every culture in every location at every point in time has developed some supernatural belief system. And believing in God may have been evolutionarily advantageous to humans as it provided a framework for promoting social good.

Fourth graders at a Southeast San Diego school got some hands-on engineering experience on Wednesday. Chemical company DuPont helped about a hundred youngsters at Walter Porter Elementary build and ra