Editor in chief Nancy Shute writes about the challenges of defining brain death and the first GM mosquitoes in the United States.

On this episode, we explore the space between life and death — changing views on where the line is between the two, terminal lucidity, and what happens after we die.

Where, exactly, is the line between life and death? Does the answer change if the person asking is not a philosopher but a transplant surgeon eager to save a life? Or a patient desperate for a new ...