Aug 13 Watch Napolitano: Immigration Issues Don’t Merit Constitutional Changes A new $600 million bill will put more personnel and security measures along the U.S.-Mexico border. Jeffrey Brown talks to Homeland Security Secretary Janet Napolitano about how this bill will affect security efforts already in place. Continue watching
Oct 19 Watch In Greenland, Ice Unlocks Climate Change History Scientists dig deep into Greenland's ice to unearth the history of climate change. Climatologist and Climate Central correspondent Heidi Cullen reports. Continue watching
Oct 09 Moon Explosion Could Yield Water for Humans A NASA spacecraft crashed into the Moon on Friday morning, on purpose, in a bid to discover ice hidden below the lunar surface. Continue reading
Sep 30 Phoenix Lander Witnesses Snow on Mars By PBS News Hour NASA's Phoenix spacecraft has spotted snow falling from Martian clouds, and detected evidence of past water at its landing site in the Martian arctic plains. Continue reading
Jun 20 Watch NASA Lander Discovers Evidence of Ice on Mars NASA's Phoenix Mars Lander found evidence of water-based ice on Mars, confirming some scientists' theories. Scientist Peter Smith of the University of Arizona discusses the discovery. Continue watching
May 26 Watch NASA’s Phoenix Sends Intriguing Images From Mars NASA's Phoenix Mars lander touched down Sunday and began transmitting pictures from the northern arctic plains of Mars where scientists hope to find evidence of water and life-sustaining conditions. Mission co-leader Ray Arvidson explains. Continue watching
May 01 Watch Colorado Town Copes with Immigration Raids Five months ago, federal agents arrested more than 200 illegal workers at a meatpacking plant in Greeley, Colo. The NewsHour reports on how the town and immigrant community are dealing with the aftermath. Continue watching
Feb 06 Watch Essayist Shares Thoughts on Weird Winter Weather Guest Essayist Nancy Gibbs explores the extreme, and extremely confusing, winter weather. Continue watching
Dec 18 Watch Communities Divided after Meat Plant Immigration Raids Residents of Greeley, Colo., like many towns affected by raids on meat plants last week that led to the arrest of more than 1,000 allegedly undocumented workers, are debating the impact of immigrants on their communities. Continue watching
Jan 23 European Orbiter Confirms Ice in Mars Polar Cap Europe's Mars orbiter has found the most direct evidence yet of water in the form of ice in the south polar cap of Mars, the European Space Agency announced Friday. Continue reading