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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Great Performances: Now Hear This "Beethoven's Ghost"

Go inside the mind of a genius as host Scott Yoo and fellow musicians undertake a recording of Beethoven's most personal music at a historic Berkshires manor to explore the composer’s brilliant career—where they are visited by some unexpected guests.

Nature “My Garden of a Thousand Bees”

Filmmaker Martin Dohrn set out to record all the bees he could find in his tiny urban garden in Bristol, England.

“Check, Please! Arizona” returns to Arizona PBS

Three guests sit at the Check, Please! Arizona table on set with host Mark Tarbell.

Arizona PBS is issuing a call for nominations of local and independently owned Arizona restaurants to be featured on new episodes of returning fan-favorite series “Check, Please! Arizona.”