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Bicycling Science The bicycle is almost unique among human-powered machines in that it uses human muscles in a near-optimum way. This new ed...

Bicycling Science The bicycle is almost unique among human-powered machines in that it uses human muscles in a near-optimum way. This new ed...

T he Surface of the Sun Here let us return to and see what more we know about the photosphere—the sun's surface. It is from the photo...

Here let us return to and see what more we know about the photosphere—the sun's surface. It is from the photosphere that we have gaine...

THE SOLAR SYSTEM THE SUN But now let us turn to the Solar System, and consider the members of our own little colony. Within the...

THE SCALE OF THE UNIVERSE—THE SOLAR SYSTEM The story of the triumphs of modern science naturally opens with Astronomy. The picture of the U...