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Tiny, scale-like objects
Another microscopic photo. These tiny structures define an entire group of organisms, even giving them their name. What are they from?


Onion cells
These are onion cells, photographed through my microscope at 40X. Why do onions make your eyes water when you cut them?


colorful crystals
I took this photo while working on the "Micro-Crystals" video, and thought this might be a challenge. What common chemical is this? Hint: The colors are from polarizing filters. The crystals are normally clear.