from the not-even-the-rain-has-such-small-fingers dept.
Several folks told the tale (also reported on Slashdot) of a 670 µm microbot developed at Linköping U., Sweden. The published paper, in Science, is available online.
From the abstract: "This microrobotic arm can pick up, lift, move, and place micrometer-size objects within an area of about 250 micrometers by 100 micrometers, making the microrobot an excellent tool for single-cell manipulation." (The researchers do not claim the ability to manipulate single cells in vivo, however.)