Megan Smith

We have two boys, and one of our kids is much more interested in history and stories, so if you want him to do some calculations about lenses, you would start talking to him about Galileo... Then he would be into the lenses, but if you just start talking to him about lenses, he might not stay with you.

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.

Having a Congress with a more diverse educational and professional background would serve the country well. And given the budget challenges facing America today, we might benefit from a few more cold, calculating problem solvers, and fewer courtroom impresarios.

The thing about dancing - what it taught me all those years - is it gives you an amazing sense of discipline in forcing yourself to do things that you know are good for you but you don't really want to do.