Scientists expand the gene editing functions of CRISPR, making it safer and more precise. Plus, an insect-like robot can take off using - and from under -water. And Kelly and Zach Weinersmith ponder the good and bad of emerging technologies.

Caitlin Doughty traveled the world to document how different cultures deal with their dead. Now, she challenges us to develop a better relationship with mortality. Plus, two scientists want you to stop worrying and love spiders.