In July 1991, the alignment of the Sun, Moon, and Earth produced a total solar eclipse with a particularly long duration and a path that crossed easily accessible locations, including a major astronomical observatory in...
This video segment points out that we are consuming fossil fuels at a rate far faster than they can be produced in the Earth, and that combustion of these materials to produce energy releases carbon dioxide, a...
In this video segment, Dr. Ayanna Howard, a robotics engineer at NASA's Jet Propulsion Laboratory, describes the process of designing and developing robotic devices to act as surrogates for humans in planetary...
All the stars in the universe, including the Sun, are nuclear furnaces fueled by fusion. Beginning with the fusion of hydrogen and continuing with fusion of successively heavier elements, stars form all the naturally...
Started in 2002 by WGBH, the Teachers' Domain website brings together over 1000 free media resources from a range of public television programs such as Design Squad and Frontline. Here visitors will find both video and...
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