Uncategorized
- Math
Immersed in Klein Bottles
“Need a zero-volume bottle? Searching for a one-sided surface? Want the ultimate in nonorientability?” One way to depict a Klein bottle. Computer-generated image by John Sullivan, University of Illinois at Urbana-Champaign Joining the top and bottom of this rectangle produces a cylinder. Matching the arrows of the remaining two sides produces a Klein bottle. One […]
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From the February 14, 1931, issue
SMALL CHANGES OF SUN’S HEAT CONTROL WEATHER ON EARTH The sun when it radiates heat and light to Earth also broadcasts information that can be used to foretell the weather here on Earth. Dr. C.G. Abbot, secretary of the Smithsonian Institution, after more than two decades of solar observation, announced today through the medium of […]
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Skeleton Search
Visit the e-Skeletons Project to take a close-up tour of the bones of a human, gorilla, and baboon.
