Catalyst: Earth’s oxidation event

“Catalyst” connects with a geologist who examines rock samples and oxygen molecules to study planet Earth’s “Great Oxidation Event” 2.5 billion years ago.

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In this segment:

Ariel Anbar, PhD

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Arizona talent brings new kids’ show to life

Molly of Denali

“Molly of Denali” follows feisty 10-year-old Molly Mabrary and her adventures while living with her family in the fictional village of Qyah, Alaska. The series premieres July 15 on Arizona PBS.

'Great Performances at the Met' returns to Sundays at 9 a.m.

Great Performances at the Met "La Fanciulla Del West"

"Great Performances at the Met" brings the best of the Metropolitan Opera into the homes of classical music fans across the United States.

Competitive ballroom dancing takes center stage

The WORLD DANCESPORT GRANDSLAM SERIES is back, featuring the best competitive dancers in the world vying for the most prestigious titles and the prize money in the world of dance. Pictured (L-R): Olga Kulikova and Dmitry Zharkov of Russia. Photo credit: © Reinhard Egli – World DanceSport

Competitive ballroom dancing returns to Arizona PBS with the 2017 World DanceSport GrandSlam Series. The best competitive dancers in the world vie for the most prestigious titles on Sundays at 3 p.m., beginning July 7.