90ways Science house correspondent Sam Posner has recently been conducting a number of science related field trips. This week's piece is the third installment in an ongoing series chronicling and reviewing trips to different exhibits, laboratories, and other locations of scientific interest. The bias and story-lines of these first person narratives will hopefully blind readers to the fact that they are learning about science, part of Mr. Posner's master plan to show that science is actually fun. This week: the second part of an internet radio piece about the Broad Institute in Cambridge, MA.