Web Exclusive: Somerhalder answers Twitter questions from viewers.
The actor-activist explains his passion for protecting the environment.
The Nobel laureate offers his observations about the effects of inequality.
The multifaceted performer unpacks his memoir, "Transforming Pain to Power."
The scholar of Russia and the former USSR weighs in on the continuing crisis in Ukraine.
The "Christianity Today" editor-at-large shares how to face challenges to faith.
In recognition of Earth Day 2014, the atmospheric scientist weighs in on climate change.
The "Orphan Black" star talks about the buzz surrounding her hit BBC America show.
The Pixar & Disney Animation president recounts lessons learned in his successful career
The Iranian-born composer, instrumentalist & vocalist talks about his pioneering music.
Newman discusses her text, "After Freedom," about post-apartheid South Africa.
The Grammy-nominated musician talks about his Americana tour.
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