Leonard D. Baer, David R. Butler, Space-Time Modeling of Grizzly Bears, Geographical Review, Vol. 90, No. 2 (Apr., 2000), pp. 206-221 ...

Space travel looks like fun--what with weightlessness and the views--but it can be murder on the human body. In the absence of gravity, muscles, bones, ...

The Omega Speedmaster model that Neil Armstrong wore when he walked on the moon on July 21, 1969, costs about $20,000 today. Omega calls it the Moon Watch.

What does it mean to be to space-time? The seemingly simple question gets to the essence of twentieth-century physics and has ...