The Exploratorium celebrates the 20th anniversary of Pi Day in Second Life.

Former NASA astronaut and planetary scientist Tom Jones and Alan Boyle preview Asteroid Day, an occasion that highlights the threats and opportunities posed by near-Earth objects.

Alan Boyle speaks with Mark Showalter, planetary scientist at the SETI Institut.

Alan Boyle – Science editor, NBC News Digital – talks with Will Pomerantz, Virgin Galactic’s vice president for special projects, talks about the space venture’s next frontiers.

Marc Abrahams, creator of the Ig Nobel Prize ceremony and editor of the Annals of Improbable Research returns to talk with Cosmic Log’s Alan Boyle.

Alan Boyle & Marc Abrahams – creator of the Ig Nobel Prize ceremony and editor of the Annals of Improbable Research.

Colonize our solar system? Seth Shostak, Senior Astronomer and Director of the Center for SETI Research, talks with Alan Boyle abut Interstellar and other ideas afloat in the culture.

Medical historian/ethicist Alice Dreger (Northwestern) and Kelly Hills discuss Dreger’s new book, Galileo’s Middle Finger: Heretics, Activists, and the Search for Justice in Science.

Astronomer, writer, and columnist (Slate) Phil Plait comes by to talk with Alan Boyle about the Apollo 11 anniversary, moon hoaxes you have known, and the outlook for lunar science and exploration.

The home team prepares for hosting the solar eclipse broadcast and event.

Jennifer Ouellette discusses dark matter and dark energy with author and theoretical astrophysicist Katherine Freese.

Medical anthropologist, Dr Adia Benton and Kelly Hills talk about Benton’s new book, HIV Exceptionalism: Development through Disease in Sierra Leone.