An American theoretical physicist who worked in particle physics and cosmology, she was also known as the Frank B. Baird, Jr., was a former guest on a podcast that was described as "a think tank promoting science, reason, and secular values in public policy and at the grass roots"; when was that podcast started?
Point of Inquiry:  Former guests include leading scientists, writers and public intellectuals such as Neil DeGrasse Tyson, Paul Krugman, Lisa Randall, Brian Greene, Oliver Sacks, Susan Jacoby, David Brin and Temple Grandin.
i don't know