Creator	Role	# of Episodes
Natalia Reagan Natalia Reagan is an anthropologist, primatologist, actor, producer, writer, hos... more	Host	15
Dr. Gavin A. Schmidt Gavin A. Schmidt is a climatologist, climate modeler, director of the NASA Godda... more	Guest	1
Bill Nye Popularly known as Bill Nye the Science Guy, Bill is an American science communi... more	Guest	3
Seth Shostak Seth Shostak is a senior astronomer for the SETI Institute and former director o... more	Guest	4
Ross Andersen Ross Andersen is a journalist. Currently, he is a senior editor at The Atlantic,... more	Guest	2
Summer Ash Summer Ash is a director of outreach for Columbia University’s Department of Ast... more	Guest	1
Helen Fisher Dr. Helen Elizabeth Fisher is a biological anthropologist, human behavior resear... more	Guest	2