Catalyst: Detecting sicknesses before first symptoms

What if you could detect a disease before the first symptoms appear? Could early detection stop cancer before it takes hold? Scientists are exploring those questions by studying personal immuno-signatures.

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'Nova' returns this winter with new episodes Wednesday nights

From volcanoes to space exploration, "Nova" explores our world every Wednesday at 8 p.m. on Arizona PBS.

'Tastemakers' unearths America's current and future culinary artisans

"Tastemakers" is part of an hourlong tribute to food - both locally and nationally - every Thursday night at 7:30 p.m. on Arizona PBS, immediately following new "Plate & Pour" episodes.

Watch new episodes of ‘Plate & Pour’ every Thursday at 7 p.m.

Join Mark Tarbell as he takes you inside some of the most interesting places to eat.