My husband just launched his own Scanning Electron Microscope (SEM) rental business a couple of months ago. He works at his full time job with SEMs and so I've been exposed to some of the images before but anything he took was technically owned by his company.
His new microscope takes black and white images up to 45,000 times zoomed in by shooting electrons at the sample. It also can tell you what elements the sample is made of by collecting X-rays.
To tell the truth the whole process baffles me but what I do know is that the pictures are absolutely fascinating blank canvases. I took some of the more interesting ones and learned how to artificially color them in Photoshop. Here are some of the pictures of typical food mold that I've colored.