Physcs

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Perpetual motion machine inventors do have principles. Unfortunately the physical principles they assume are often ones not obeyed by nature.

The Museum of Unworkable Devices Physics Gallery

http://www.lhup.edu/~dsimanek/museum/physgal.htm

What causes gravity

http://www.simplegravity.com/ Unfortunately, my next statement may confuse rather than enlighten as the concept of dark energy has not yet been clearly defined and I may be guilty of hijacking the term.
http://www.tenthdimension.com/phpbb/index.php Hi, this is Rob Bryanton.

Imagining the Tenth Dimension

Universe Today — Space and astronomy news

http://www.universetoday.com/ SpaceX Dragon approaches the ISS on COTS 2 test flight slated for May 19 liftoff and docking on Day 4.