You can build a model of the Great Pyramid, but first you need to scale it down. To do this, you will need to make the pyramid 3,000 times smaller than it really is! To achieve that, every 30 ...

There's a room in Boston City Hall where you can see the entire city all at once. The planning department's model room is a large, open space that houses a 1:40 inch scale, three-dimensional ...