'Heat wave' vs. 'cold snap.' Why reading stories makes you smarter. Rogering.

1103. Why do we talk about "heat waves" but "cold snaps"? This week, we look at the history behind these common weather phrases and other quirky idioms like "raining cats and dogs" and "under the weather." Then, we look at what kind of reading is best for improving your language skills, including research on the benefits of fiction versus nonfiction.