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NASA smacked two spacecraft into the lunar south pole Friday morning in a search for hidden ice. Instruments confirm that a large empty rocket hull barreled into the moon at 7:31 a.m., followed four minutes later by a probe with cameras taking pictures of the first crash.

Gratitude, research psychologists have found, is an abstract concept. It requires reflecting on not only how another person has done right by you, but also how you might return the favor.

An astronaut who earned her doctorate at UC San Diego was blasted into space today aboard the space shuttle Atlantis, which took off from Kennedy Space Center in Florida for a mission to make improvements to the Hubble Space Telescope.

The three-term governor who touts his record of job creation in Texas faced tough questions at Wednesday's presidential debate about the fuller picture of the state under his leadership. And that picture, as much as anything else, may resonate with a national audience seeing him for the first time.

Airs Sunday, August 15, 2010 at 3 p.m. on KPBS TV

How would ordinary people eliminate the state’s $28 billion deficit and balance California’s budget? KPBS News reporters took a crack at it using an ingenious web tool created by The Los Angeles Times.

Scientists have known for decades that nicotine decreases appetite among smokers, but they didn't know why. It turns out that nicotine activates a pathway in the brain that suppresses appetite, a new study finds.

Where is climate change currently happening on Earth, and what's causing those changes to occur? We speak to a physicist from the Jet Propulsion Laboratory about where major climate changes are taking place, and how climate modeling helps to predict future changes in our atmosphere.

It's been 40 years since humans first stepped onto the surface of moon. What's next in space exploration? Some scientists have their sights set on Mars.

Newt Gingrich rose to prominence as the leader of the 1994 Republican revolution, in which the GOP took back the House majority after 40 years in the wilderness. During his reign, Congress forced a government shutdown, overhauled the welfare system, balanced the budget for the first time in decades and impeached the president.