Use of small Nuclear Reactors for Energy Budget of U.S.

Thanks to Matt S. for this one:

This is a really cool idea. The fact that we can make small nuclear reactors that can be transported around the country and built for less than a fifth the cost of a current nuclear reactor. This is also a great step towards reducing our countries emissions and making the world a better place to live.

http://www.nytimes.com/2011/02/13/science/earth/13nuke.html?_r=1&src=twrhp

How to Play Einstein for a Day: Mass and Energy

We know that strange things happen when objects move relative to other objects. Clocks run more slowly, lengths get shorter, and mass increases for the moving object, relative to an observer at rest. These are well confirmed over the last century from countless experiments.  We also know E = mc^2 comes from special relativity. But how did Einstein do it? Where did he get the idea that energy and matter aren't just related, but actually equivalent to each other?

Check this out!!  It is one way of thinking about it, and getting to a result that shows energy and matter are of the form E = mc^2.  It makes use of the binomial approximation when thinking in terms of everyday speeds, which are far slower than light.