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"The moderates are acting like conservatives usually do," Cruz told NPR. The Texas senator is positioning himself to capture supporters from Donald Trump or Ben Carson, should they falter.

He was persecuted because some of his own countrymen didn't like the tribe he belongs to. Now the quiet 27-year-old is an anti-tribalism activist.

As CEO of Connect, Duane Roth served as a facilitator and spokesman for San Diego's innovation industry. Roth died Saturday from injuries sustained in a bicycling accident. Over the weekend, local tech and life science leaders paid their respects.

Scientists at the Scripps Research Institute in La Jolla were able to improve symptoms of a fatal brain disease in mice, even in those not directly given any drugs.

Personal rapid transit was supposed to be the future of public transport: lightweight pods on elevated tracks, on-demand destinations. But funding issues make cities reluctant to change course.

Put down that screen: today's the day to celebrate holding a bound book in your hands. For World Book Day, we bring you a roundup of stories and reading lists.

According to new research, plants can hear the sounds of insects chewing. A University of Missouri study reports that plants can recognize the sound of a predator using the vibrations of their leaves.

Last month geologists published a paper in the journal Science that concluded the Grand Canyon -- or at least part of it -- is much older than most researchers think. The study reopened a contentious debate among scientists.

Red means stop; green means go. You live in a red state or a blue state. Elizabeth Blair kicks off NPR's color series with a look at the way color organizes our lives — in ways we don't even realize.

Airs Wednesday, November 6, 2013 at 10 p.m. on KPBS TV