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Many teachers in urban schools don't understand their students or the places they live, says author and educator Christopher Emdin.

Patrick Awuah left his job as a Microsoft engineer to establish a new kind of school for his country. That accomplishment has now earned him a "genius grant" of $625,000 from the MacArthur Foundation.

The food industry has long marketed highly processed products to kids with characters like Tony the Tiger. But similar tactics can also work to sway school kids to eat more vegetables, a study finds.

Using gold, silicone and heart cells from a rat, scientists have made a tiny artificial stingray. The engineering involved in propelling it could help make a heart that's more than a mechanical pump.

Airs Tuesday, February 10, 2015 at 8 p.m. on KPBS TV

What if there were a way to take the waste heat that spews from car tailpipes or power plant chimneys and turn it into electricity? An entrepreneur says something called thermoelectrics is the key.

You can nudge your kids' relationship with digital technology in a more healthful direction, but warning: It's going to require parents to change, too.

"It's hard to stay warm when you're surrounded by cold water but the opah has figured it out," a NOAA Fisheries biologist says.

A Senate investigation finds that Medicaid programs in 33 states spent more than $1 billion on the hepatitis C drug Solvaldi in a single year.

Author Sonia Shah says that urbanization and air travel put the global population at an increased risk for disease. "Zika is a great example of how new pathogens are emerging today," she says.