The Benefits Of A Good, Long Yawn

A new study says that the size of a yawn can be used to predict to the size of one's brain.

Researchers at the State University of New York at Oneonta studied 19 species, including humans, and found yawning to be a stimulant for brain growth.

Here & Now's Jeremy Hobson is joined by Sharon Begley, senior science writer for STAT news, for more on the study.

Sharon Begley, senior science writer for STAT news. She tweets @sxbegle.