Under My Thumb

At the January OMSI After Dark, more than 40 people gave us their thumbprints (and their bacteria) to help grow a bacterial lawn. A bacterial lawn describes the appearance of bacterial colonies when all the individual colonies on a petri-dish merge together to form a field or mat of bacteria. What we hope to see is a patchwork of the different types of bacteria and fungi.
 
Here is a picture of ours in a large dish.

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