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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Get a front row seat for 'Lionel Richie at Glastonbury'

In June of 2015, Lionel Richie performed for nearly 200,000 fans on the main Pyramid stage at the UK’s renowned Glastonbury Festival in the Sunday teatime slot.

Celtic Woman celebrates 15 years of making music

Celtic Woman – the most successful all-female group in Irish history – is celebrating 15 phenomenal years of making music. "Celtic Woman: The Best Of" is filled with favorite songs from their journey so far.

Learn the secrets to bird watching in Arizona