Unpolished, 150 million year-old agatized dinosaur bone cells at 42x magnification. By Douglas Moore of University of Wisconsin, Stevens Point.This image won 10th place in the 2011 Nikon Small World Competition. 

Unpolished, 150 million year-old agatized dinosaur bone cells at 42x magnification. By Douglas Moore of University of Wisconsin, Stevens Point.
This image won 10th place in the 2011 Nikon Small World Competition.