One possible consequence of their existence is the "gray goo" catastrophe, in which their exponentia
One possible consequence of their existence is the "gray goo" catastrophe, in which their exponential spread consumes all life in a short time. Tiny, cage-like versions can deliver drugs straight to sites on the liver and artificial muscles made from them contract when electricity is applied. They might be used for clothes that change temperature on command or furniture that changes shape. They can be easily created because their tiny units are held togther by Van der Waals forces and one will attract several others. Their greatest potential is use in assembling and disassembling objects in short periods of time. For ten points, name these devices made from units a billionth of a meter long.
One possible consequence of their existence is the "gray goo" catastrophe, in which their exponential spread consumes all life in a short time.
{Nanomachine}s ({Nanotechnology} is fine, too, but prompt on nanotubes.)