On the 40th Anniversary of the Space Shuttle Challenger disaster, we rerelease this episode with a new introduction to include Ron McNair articles from his home, N.C. A&T Physics.

See what happens when Shelly talks to smarty-pants Jim Gates, says she is not going to talk about String Theory and immediately asks questions about String Theory. Hear about String Theory’s Doppelganger, the history of black holes, fulfilling a dream of riding the Trans-Siberian Railroad, and how it all comes back to nuclear physics.

How likely is it that the US will restart nuclear testing? How much time would it take? You might be surprised by the answers. Join Shelly as she discusses this and other topics with Hans Kristensen, Director of the Nuclear Information Project at the Federation of American Scientists. And we find out - things can get much worse.

Lee Kuhln and Nathan Radke join Shelly to talk about the No. 1 Netflix movie - House of Dynamite and answer the question, "Is the movie Dyn-o-mite"?

How close were the Germans to building an atomic bomb? What went wrong? Listen to the conversation with historian Mark Walker to find out more.

Not actually a bunker but a fallout shelter under the Greenbrier Hotel in the hills of West Virginia. Shelly visits the bunker and then speaks with the manager of bunker tours and historian Deanna Hylton.

James Patrick Thomas speaks to Shelly about his walk for nuclear disarmament in 1981 which lasted 20 months. Along with 18-19 other pilgrims, James left Washington and journeyed to Bethlehem, walking over 6,700 miles. We hear about his decision to undertake such a monumental task, how the group made a major decision, and if Shelly would do the same thing.

>> The views and opinions expressed by guests on this podcast are their own and do not necessarily reflect those of the host or the sponsoring agencies <<

Shelly meets up with Lee Kuhnle and Nathan Radke in Toronto to discuss the ethics behind human radiation experiments. We redefine what "fun" means, Nathan shows off his "ethics" knowledge, and Lee makes the Vatican proud.

What do you think a nuclear physicist does every day? Lone genius or social butterfly? Listen to find out how Dr Kelly Chipps of Oak Ridge National Laboratory fills her time.

“As all these stories do, it started with a radioactive animal dump in Albuquerque,” is the best first line of a story I have ever heard. Listen as Eileen Welsome and Shelly Lesher discuss some of the medical experiments the US government funded on its own citizens involving radiation without their consent over the decades.