A Single Atom
The world's highest-resolution optical microscope captures the shadow of a single yttrium atom (at left, with the fluorescent-lit image at right).
Citation: "Absorption imaging of a single atom." By Erik W. Streed, Andreas Jechow, Benjamin G. Norton & David Kielpinski. Nature Communications, 3 July 2012.
Image: Streed et al./Nature Communications (Larger image)
