Exhibit and Image Sales
Information on exhibit sales, image licensing and other services from the Museum.
Chemistry, Molecular and Materials Science
Rotate the disk 180° and watch in amazement at this playful demonstration of density. The hourglasses contain granular materials and clear liquids that vary in density. The less dense liquid in one hourglass slowly flows to the top, making the grains sink. Meanwhile, the more dense liquid in the other hourglass sinks and the grains rise to the top!
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about the museum
The Museum of Science and Industry opened its doors in 1933 and is the largest science museum in the Western Hemisphere.