What lies beneath the black plastic of a USB flash memory stick. Magnified 500x. If you look closely (and if tumblr resolution allows) you can see uniformly spaced rows of black dots that look like morse code. They adorn the golden L-shaped bars around the center of the photo, and in the top right.
These alien dots are actually the physical representation of the data you store on the USB drive. In my case, it is a research poster and 3 materials engineering lab reports.
Source: My colleague and I, along with a retired microscope from Texas Instruments
(submission from 1mind2uses)