This will make you feel better about nanotech

[rom65536]

Granted, most of us are at least notionally aware of the content of this video.... But still, it's rather impressive what our current technology is doing.

This whole family of youtube channels (NumberPhile, ComputerPhile, Sixty Symbols and a couple more) are really informative.

[sandcastles]

The video doesn't work any more.  Where was it?