Many have fallen of the new year's resolution bandwagon soon after adopting a new diet or quiting smoking. So how can you achieve year-end goals and start the year on a positive note? Roy Baumeister, co-author of Willpower: Rediscovering the Greatest Human Strength , has some tips.

Twin GRAIL spacecraft on a mission to study lunar gravity are nearing the end of their almost four month journey. The probes are expected to reach the moon on New Year's Eve and New Year's Day. GRAIL's principal investigator, Maria Zuber of MIT talks about the data they hope to collect.

In the world of science, 2011 may go down as the year of the retraction. Lots of highly publicized discoveries got debunked this year. And many of those discoveries involved findings that both scientists and the public really wanted to believe.

Robert Siegel speaks with Shree Bose, the winner of this year's Google Science Fair. Bose investigated why cancer cells become resistant to the chemotherapy drug Cisplatin. Through her research, she discovered a specific protein that makes cancer cells resistant to the drug.

Pigging out for even a day causes inflammation in the brains of lab rats, and scientists think this might help explain why it's so hard for people to lose weight. If eating too much inflames human brains, too, then scientists might be able to come up with new ideas for taming obesity.

Three years ago, scientists found plenty of cod in the region but data this season indicates just the opposite. Federal regulators say stocks are at such dangerously low levels, cod fishing might need to be shut down. Fishermen say they don't believe the reports.

Harbor porpoises are showing up in growing numbers under the Golden Gate Bridge. Six decades ago, they were driven away in part by wartime activities and poor water quality; now, researchers are trying to understand why they're returning.