## Saturday, January 15, 2011 ... //

### Physics Stack Exchange

The server

Physics.StackExchange.COM (click)
allows you to ask questions about physics - and someone will answer them. Or you may answer questions asked by others. In recent days, I spent many hours with this server by the latter activity.

A similar server exists for maths, too. And probably other disciplines you may mention in the comments.

Via Cosmic Variance