Monthly Archives: June 2011

How Big Is the Universe?

This is just a very small section of sky, smaller than the diameter of the full moon as seen from earth. It looks completely empty and black to the unaided eye, but the Hubble Space Telescope photographed all these galaxies … Continue reading

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Pool-Playing Robot

There has been tremendous progress in robotics recently. Here’s one that plays pool. A robot, of course, is just a machine of any kind that is controlled by a computer. The computer is its “brain”. So it’s very significant to … Continue reading

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Ring Species: A Fascinating Example of Evolution

This is not the only example of a “ring species” by any means. A more familiar one to many people is the encitina, a California salamander. It probably originated in Oregon around ten million years ago, and migrated south through … Continue reading

Posted in critical thinking, evolution | Leave a comment