Catalyst: Car interior temperature

“Catalyst” follows climatologists who are tracking the rapid rise of a car’s interior temperatures during the summer.

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In this segment:

Gene Brewer, PhD,
Jennifer Vanos, PhD,
Nancy Selover, PhD,

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'America's Test Kitchen' counts down most popular recipes for 20th anniversary

To celebrate 20 years of the most-watched cooking show on public television, "America's Test Kitchen" fans around the country voted for their all-time favorite recipes from the series. The results are presented now as Bridget Lancaster, Julia Collin Davison and their fellow cast members count down the series’ 20 most popular recipes and look back on the show's best moments.

Animals take flight in 'Supernature - Wild Flyers'

The sky is one of the world’s most challenging places to thrive, but across the planet an extraordinary and unexpected range of animals does something we can only dream of – taking flight.

'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.