Hosts
Summer Ash
Heather Berlin
Helen Fisher
David Grinspoon
Janna Levin
Charles Liu
Amy Mainzer
Michael J. Massimino
Chuck Nice
Bill Nye
Gary O’Reilly
Carolyn Porco
Natalia Reagan
Emily Rice
Seth Shostak
Natalie Starkey
Neil deGrasse Tyson
Co-Hosts
Maeve Higgins
Matt Kirshen
Leighann Lord
Eugene Mirman
Chuck Nice
Sarah Rose Siskind