John Horgan interviews an IRA terrorist and wonders if he's made a huge mistake.
John Horgan studies terrorists and finds nuance and complexity where others see only evil.
A bunch of men try to create a kind of "female viagra," but they forget to talk to women.
Nicole Prause finally gets a Harley Davidson... and all hell breaks loose!
Nicole Prause asks questions about human sexuality that scare other scientists.
Chris Hadfield takes a walk in outer - and inner - space.
We ask astronaut Chris Hadfield a bunch of silly questions.
Chris Hadfield makes a music video tribute to David Bowie and returns a viral sensation.
Janet Iwasa uses heranimation skills to depict HIV cells.
Janet Iwasa studies animation in Hollywood.
Janet Iwasa animates creates a beautiful way to communicate about the molecular world.
Danica and Winnie both have thier first kiss on the set of "The Wonder Years".
Danica McKellar's first math book helps girls become BFFs with math.
Danica McKellar becomes Winnie Cooper... then she finds out that she's something more.
Cynthia Erenas dreams big, builds technology and challenges gender roles.
Cynthia Erenas connects with will.i.am and becomes a superstar teen roboticist.
We give Cynthia Erenas 30 seconds to offer tips on robot-building.
Bisi Ezerioha drives really, really fast to find his calm peaceful center.
Bisi Ezerioha gives the keys to his 1029 horsepower mini-van to the guys from "Top Gear."
Bisi reveals that even the very coolest car movies typically get the science wrong.