Don't look now. The future is charging up on us in the most alarming ~ the most exciting ~ way.

One of the major obstacles to building molecular-sized biomachines looks like it's been overcome, at least for some applications. Scientist Chad Mirkin and his colleagues have turned an atomic-force microscope into a 21st century quill pen, which "dips" into DNA ink and can write onto a variety of substrates.

This Wired article has more.

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