Roger Pennell, Vice President of Trait Development at Ceres, Inc., delivers a keynote address at the 5th Annual DOE JGI User Meeting on March 25, 2010.
A documentary about volcanic eruptions, their causes and effects on Earth and the geological implications of those events in history and in the future - Part 2.
Voyager II, a NASA spacecraft, demystifies Saturns's rings; Further analysis of dust particle patterns (called spokes) on space images of the planet lead to the conclusion that the spokes move with Saturn's magnetic field and not sporadically.
A look back at Voyager II's incredible images of Saturn.
