Electron Microscope Mystery 3Posted: April 24, 2012
The width viewed in the top image is ~ 100 microns (0.1 mm) and the bottom ~700 microns (0.7 mm). Can you guess what it is?
Note: Some of my DC friends have seen this before, so I ask them to kindly let others guess.
Update, 5:05p: Nice job, Callan! Staples on end is right: