Oh! Streetcar!

Cool article in The Christian Science Monitor about the appeal of streetcars for building and maintaining dense central districts in American cities.

Desire grows for streetcars
Urged by mayors and advocacy groups, US cities and towns are examining the possibility of returning the forgotten vehicles to their streets.
By Cristian Lupsa | Correspondent of The Christian Science Monitor.

Where is the universe expanding to?

I’m not a good physics student and the question “Where is the universe expanding to?” is one I’ve not one I’ve ever received a satisfactory answer too. A friend of mine in college who majored in physics told me “The universe is expanding into itself.”

Now Scientific American takes a crack at breaking through the dense matter that is my brain.

Scientific American: Where is the universe expanding to?

I still don’t get it. Where is the exterior of that balloon? I need a better analogy.