Seeing Red … Blood Cells

Credit: Sunney Xie/Harvard University

More than once, Paul Krugman has accused the Democrats, in their ongoing battles with Republicans, of “going for the capillairies.” Good news, Paul! Now they can see the capillaries.

Scientists at Harvard University have developed a noninvasive imaging technique that captures images at the molecular level so quickly that they can “watch” red blood cells move through the capillaries of a live mouse. The system uses two laser beams set at different frequencies to excite specific types of molecules in the skin. A custom-designed detector picks up the excited molecular signal and translates it into an image.

Lasers Give Scientists Close-Up View of the Skin – Technology Review

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