Podcast: Smoking mothers, record-breaking sea turtles, and how starlings move like liquid helium By Xochitl Rojas-Rocha, Sarah CrespiJul. 31, 2014 , 2:00 PM Do pregnant women alter their infants’ DNA by smoking? What can humans do to protect a sea turtle that migrates 4000 kilometers from home? And how is a flock of birds like liquid helium? Science’s News Intern Xochitl Rojas-Rocha chats about these stories and more with Science’s Sarah Crespi.