Woo hoo!   The Bacteria Trifecta! 

From USA Today: 

Evolution seen in a yogurt cup

By Robert C. Cowen

If you want to see evolution in action, check out your local market’s dairy section. One of the bacteria in yogurt is undergoing an extreme makeover. It’s shedding parts of its genetic heritage wholesale as it morphs into an organism that loves to live in — and perhaps can only live in — fermented milk.

The ability to trace the transformation of Lactobacillus bulgaricus (L. bulgaricus), a common bacterial culture in yogurt, illustrates the penetrating insight into evolutionary processes that DNA analysis now gives biologists. No longer are they limited in their study of an organism’s changes in form and function. They can read those changes as they are written into the organism’s genetic code.

(more here)