The photomicrographs posted here are the best examples that have been collected. If you have a better example of these or any additional materials that you would like to have added to the Atlas, please email them to Kelcie Barnts at email@example.com.
An extra big thank you to Drs. Harvey Kessler, Zohreh Khavandgar, and Paras Patel for their contributions.
Click on the image to review photomicrographs of the foreign material.