Feb 12 More Satellite Collisions Could Occur, Experts Say By PBS News Hour As space officials continued to track the debris fields created by Tuesday's collision of two satellites, experts warned that more crashes will inevitably occur in the increasingly crowded orbits above Earth. Continue reading
Jan 22 New Study Shows Warming Trend in Antarctica By Admin, PBS News Hour Antarctica, a part of the world that researchers had previously believed was bucking the trend of global warming, is getting warmer after all, according to a newly released study. Continue reading
Dec 05 Rocks on Mars Shed New Light on Planet's Ancient Climate Cycles By PBS News Hour In the stratified layers of a rocky Martian outcrop, researchers have found evidence of ancient climate cycles similar to the ones that caused Earth's ice ages. Continue reading
Nov 11 As NASA's Phoenix Mission Ends, Scientists Begin Data Analysis By PBS News Hour NASA's Phoenix Mars Lander sent what will probably be its last signal back to earth last week, succumbing to a dust storm and advancing winter weather. However, the lander outlived its planned three-month mission by two months. 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
Jul 31 Scientists Find Liquid Lake on Saturn's Moon By PBS News Hour Researchers have spotted a liquid lake on Saturn's moon Titan, making that moon the first celestial body shown to have fluid on its surface. But this isn't a lake you'd want to swim in -- it's made up of ethane,… Continue reading
Jul 25 Scientists Discover What Makes the Northern Lights Dance By PBS News Hour Scientists and stargazers alike have long been fascinated by the auroras, also known as the northern and southern lights -- the bands of light that stretch and sometimes dance across the night sky near the earth's poles. Continue reading
Jul 10 Lunar Water Signs Found in Apollo Mission Rocks By PBS News Hour A new analysis of moon pebbles collected decades ago has found that the small stones contained traces of water, according to a report Thursday in the journal Nature by Brown University geologist Alberto Saal and his colleagues. 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