Researchers deconstruct the physics of a revered centuries-old process: writing with a fountain pen. Image Credit: János Fehér Wetting a fountain pen to compose a thank-you note is a grand way to express gratitude for a holiday gift, yet we often don’t give a thought to what happens when ink moves from pen to paper. But for a team of South Korean and American scientists, the medium is more important than the message -- and can even provide new insights into ancient biological systems.
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