Computer-Controlled Bacteria Build Microscopic Pyramid

[youtube]http://www.youtube.com/watch?v=fCSOdQK5PIY&feature=player_embedded[/youtube]

Researchers at the École Polytechnique de Montréal used bacteria that follow magnetic pull to build a tiny pyramid:

By using a computer-controlled magnetic field, the researchers turned the bacteria into fully-compliant biological nanorobots.

The trick was using a type of microbe known as magnetotactic bacteria. These critters have little internal compasses, and will follow the pull of a magnetic field…

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