The "layer cake" stratigraphy of the Colorado Plateau is a great place to see the three pioneering Geological Concepts of Nicolas Steno on display.
Wednesday, January 11, 2012
Sunday, January 1, 2012
National Geographic Video - Electronic Magnetic Pulse
Electronic Armageddon - whether by nature or by man - would be a nightmare for the advanced parts of the North American Continent.
Subscribe to:
Posts (Atom)