The National Oceanic and Atmospheric Administration provides a photo library of severe weather formations. This photograph, captured by doppler radar, is of a tornado in its early stage of development in Union City, Oklahoma, 1973.

The National Oceanic and Atmospheric Administration provides a photo library of severe weather formations. This photograph, captured by doppler radar, is of a tornado in a mature stage of formation in Union City, Oklahoma, 1973.

An O'Reilly discussion of how Ruby on Rails works and how it fits into the open source LAMP stack.

Proof that you can see the Great Wall from space, but you can't see it from the moon.