47: David Grinspoon, Astrobiologist

Like it or not, humans have become the dominant agent of change on the planet, and as we proceed further into the Anthropocene period, we have a responsibility to accept responsibility and find a way to gracefully integrate our presence. But what if we are not the only ones who have experienced this phenomenon? What if the process of inadvertent planetary change is universal? What if the climate challenges we face are a natural part of planetary evolution?