Existential Risk: A User’s Guide

Daniel Holz studies black holes, gravitational waves, and cosmology, all while also running the Existential Risk Laboratory at the University of Chicago. In this episode, Daniel helps us shed light on some of the biggest threats facing humanity—the kind that could really do us all in. On Daniel’s list: a flat-out nuclear war erupts, climate change worsens, biological warfare and bioterrorism, the possibility that the chaos of misinformation could make good governance impossible, and that artificial intelligence might decide we humans are too irrational and inefficient to keep around. (Along with some other cheery topics.)

Daniel also is part of the group that set the hands of the Doomsday Clock, which signifies how close (or how far away) we are from the end of life as we know it. (He chairs the group, officially called the Science and Security Board of the Bulletin of the Atomic Scientists.) Right now, the clock reads 89 seconds to midnight. That’s the closest we’ve ever been to a global catastrophe.

“When it’s all out in the open, you see that doom is not inevitable. There really are things that can be done, and there is a path forward. There’s definitely risk. Things are not guaranteed. But there is a path away from doom. I just hope we take it.”

– Daniel Holz, professor in Physics, Astronomy, and Astrophysics at the University of Chicago, the Enrico Fermi Institute, and the Kavli Institute for Cosmological Physics; Chair of the Science and Security Board of the Bulletin of the Atomic Scientists; and founding director of UChicago’s Existential Risk Laboratory (XLab).

Learn More About Daniel’s Work

In Daniel’s life as an astrophysicist, he’s one of the collaborators in the  Laser Interferometer Gravitational-Wave Observatory (LIGO), which works on the cutting edge of gravitational wave physics. Gravitational waves are ripples in the fabric of spacetime, triggered by cataclysmic cosmic events like the collision of black holes or neutron stars. LIGO uses incredibly sensitive laser interferometers—tools that measure tiny changes in light—to detect gravitational waves. It’s a big leap b