Novelist Siri Hustvedt knows how the creative process feels. Neuroscientist Heather Berlin knows what it looks like in the brain. Together with Steve, they explore the emerging science of creativity.

Botanist Robin Wall Kimmerer says there is a reason so many around the world consider corn to be sacred. We give it life, and in return, it gives us life. She says the industrial-scale farming of America has lost control of that balance.

Most of us get our food from the grocery store, not the fields where it grows. But if you really want to understand where our food comes from — and the potential threats to the food supply — you have to think about seeds.