How do Tasmanian devils create a “landscape of fear”? How can humidity be used to power small devices? And why did dinosaurs avoid North America in their early years? Science’s Online News Editor David Grimm chats about these stories and more with Science’s Sarah Crespi. Plus, Samuel Wasser discusses using genetics to track down sources of elephant ivory, and Suzanne Boyce talks with Susanne Bard about why it’s so hard to say the letter R.