Worth a Look Archive
Ice over the Poles - May 1, 2013
Visit this NASA Earth Observatory feature for an interesting article on ice at the Poles--both sea ice at the North Pole, and land ice on Antarctica. Be sure to see the explanation of how melting of ice sheets or glaciers can provide "positive feedback" and increase the rate of warming.
Sol Station: Sol - Apr 1, 2013
Flow Visualization - Feb 1, 2013
Check out the galleries of fluid flow images on this University of Colorado site.
Aurora over Antarctica - Jan 1, 2013
For a view from the ground of an aurora over Antarctica, check out this Astronomy Picture of the Day.
Planetary and Satellite Motion - Dec 1, 2012
Exploratorium Magazine Online: Exploring Origami - Oct 1, 2012
Check out Exploratorium Magazine Online: Exploring Origami to learn about recent advances in the art of origami. Don't miss the video of folding interlocking rings out of one sheet of paper. Also, you'll find out how the paper crane became a symbol of peace in Japan.
Mars--NASA Explores the Red Planet: Program Overview - Sep 1, 2012
Click on Mars--NASA Explores the Red Planet: Program Overview to see the first close-up image of Mars, captured by the Mariner spacecraft in 1965, and to learn about NASA's strategy for investigating the red planet. If you click on "Science Overview," and then on "Goal 4," you can find out how NASA plans, over the next decade, to study the challenges of human spaceflight.
Surface Properties of the Moon - Aug 1, 2012
Check out Surface Properties of the Moon for more on the moon's craters and surface material.
Ionizing Radiation and Humans – The Basics - Jul 1, 2012
Radioactivity is all around us--in soil, rocks, and even food--but small doses of it are not harmful. Visit Ionizing Radiation and Humans – The Basics to learn how exposure to radiation is part of our daily lives.
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