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In this segment:

Dr. Stephen Johnston,
Carlo Maley, PhD,
Angelo Fortunato, PhD

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'Nova' delivers stories from the front lines of science

"Nova" explores new discoveries and how we have come this far on Wednesdays at 8 p.m. on Arizona PBS.

Documentary series 'College Behind Bars' explores higher education inside prisons

A new four-hour documentary series "College Behind Bars" revealing the transformative power of higher education through the experiences of incarcerated men and women premieres Monday, Nov. 25, and Tuesday, Nov. 26, at 8 p.m.

Famous personalities explore their ancestry on 'Finding Your Roots'

Today's most compelling personalities discover the surprising stories buried within their own families in the sixth season of the critically acclaimed PBS series "Finding Your Roots with Henry Louis Gates, Jr." The series airs Tuesdays at 7 p.m.