Gut Feeling for New Species
The bacteria that live within animals might be even more influential than previously thought.
Scientists have long known of the important roles played by the microbes on and in our bodies — our microbiomes. These little guys outnumber our own cells 10 to 1, and they help regulate everything from the energy we get out of food to the health of our immune systems. Now, scientists believe that the bugs help play another important role: the evolution of new species.