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Marie Curie (1867-1934)
we've selected images from our collection that highlight the vital collaborations that occur between teachers and students in the study of physics. Search our collection of more than 30,000 historical images of scientists and their wo...
Power and Deregulation
talks about setting price limits on wholesale electricity. (6/18/01) <font face="Arial, Helvetica, sans-serif" size="-1"><img src="images/green_arrow.jpg" width="19" height="12"><a href="http://www.pbs.org/n...
The Digital Earth: Understanding Our Planet in the 21st Century
understandable information. Today, we often find that we have more information than we know what to do with. The Landsat program, designed to help us understand the global environment, is a good example. The Landsat satellite is capable of taking a complete photograph of...
Studying Mandelbrot Fractals
FAQ posted monthly to sci.fractals, a Usenet newsgroup about fractals; mathematics, and software, aimed at being a reference about fractals, including answers to commonly asked questions, archive listings of fractal software, images, papers that can be accessed via...
Heat Stress
Mowing Assistant Dies from Heat Stroke Migrant Farm Worker Dies from Heat Stroke While Working on a Tobacco Farm – North Carolina Fire Fighter Dies of Heat Stroke While Making a Fire Line During a Wildland Fire in California Construction Laborer Dies ...
The New Explorers: Crisis Planet Earth
human beings alter their environment. What is an urban heat island? How can the planting of trees help reduce global warming? What else can we do to protect our environment for ourselves and for future generations? Extended Activities Create a poster th...
Science NetLinks: Mona Lisa's Smile
smile. The proper understanding of the human visual system was still centuries away. Still, he knew that he pulled some kind of neat trick; the painting was one of his personal favorites and he gave it to the king of France as a gift. Livingst...
Intuitive Notion of Line Symmetry and Plane Symmetry
? Cutting the photo above on the approximate line of symmetry, and duplicating each side of the face, produced the pictures you see here. The tilt of the head accentuated these images. Doctors repair damaged human faces by reconstructing the symmet...
Eye Safety
include metal slivers, wood chips, dust, and cement chips that are ejected by tools, wind blown, or fall from above a worker. Some of these objects, such as nails, staples, or slivers of wood or metal penetrate the eyeball and result in a permanent lo...
Ernest Rutherford
won another scholarship to study at Cambridge University in England -- a turning point in his life. There he met J.J. Thomson (who would soon discover the electron), and Thomson encouraged him to study recently-discovered x-rays. This was the start of a lon...
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