In this Monday, Oct. 22, 2012 photo, biologist Jason Munshi-South discusses genetic changes he's observed while studying the impact of urbanization on New York City's white-footed mouse population during the October meeting of the Secret Science Club at the Bell House in the Gowanus section of Brooklyn, in New York. The Secret Science Club, now in its sixth year, is a monthly event where attendees mix their cocktails with lectures on scientific subjects ranging from the cosmos to neuroscience to genetics. (AP Photo/Kathy Willens)