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Director Michael Moore's latest documentary, Sicko, is an indictment of the U.S. health care system. Melissa Block sizes up Sicko — as entertainment and expose — with film critic Bob Mondello and science correspondent Joanne Silberner.

A new study reveals that a byproduct of farming is devastating the ozone layer. Nitrous oxide, also known as laughing gas, is produced when fertilizer soaks into the soil or water. Researchers say lessening the impact of nitrous oxide on the environment may be nearly impossible as global food demands increase.

Greg Mortenson has been under fire since 60 Minutes challenged the accuracy of his best-selling book, Three Cups of Tea, and charged that he personally profited from funds he raised to support girls' education in South Asia. Outside magazine's Alex Heard spoke with Mortenson after the program aired.

A California couple is suing the operators of a website that clarifies evolution for science teachers. The University of California's Museum of Paleontology operates the Understanding Evolution web

When voter registration closes at the end of today, analysts will see how San Diego’s political stripes have changed. Problems reported in voter registrations by the group “Acorn” will have little

To keep the overhaul bill under President Obama's $900 spending limit, subsidies for middle-class families were reduced. So to prevent those families who can't afford insurance from being punished, proposed penalties were dramatically cut. That, insurance officials say, could backfire in a big way.

Among those blamed by the government for ethnic violence in China's far west is Uighur economist Ilham Tohti. He says the government accepts many of his suggestions on ethnic policy, but still doesn't trust him. He has been arrested four times, though never charged with a crime.

One day after New York Gov. Eliot Spitzer admitted involvement with prostitution, NPR's Mike Pesca reports on how the news is playing in Albany.

Studies show that testing women in their 40s could save a small percentage of lives. But to some public health officials, it isn't worth the possible harm the excess testing causes. Cancer survivors and advocacy groups say the screening tool isn't perfect, but it's worth the risk.

Two teams independently discover a way to turn ordinary human skins cells into stem cells with the same characteristics as those derived from human embryos, a breakthrough that could open the door for advanced medical therapies.