How do you make a nanobot?
Imagine you are playing with a set of Legos. This set is one of the newer
ones. It has all kinds of blocks, gears, wheels, pulleys, batteries, etc. Put diļ¬erent
combinations of them together and you can build a house or maybe if you’re feeling
clever, a machine. Suppose you make a small battery-powered car. Imagine shrinking
this car. As it shrinks, the number of atoms in each Lego block must become fewer.
Eventually, you may reach the limit where each block is one atom. What if we could
make machines like this?