Environment

A voyaging canoe built to revive the centuries-old tradition of Hawaiian exploration is circumnavigating the globe. Its crew has already traveled 26,000 miles navigating with the sun, stars and waves.

These descendants of wild boars were brought over from Europe decades ago. They're highly invasive and hugely destructive — threatening native bears and deer in Great Smoky Mountains National Park.

More than three years after Superstorm Sandy, NPR and PBS's Frontline investigate the thousands still not home, the government agencies that failed to help and the companies that made millions.

Rising sea levels put extra pressure on coastal bedrock in South Florida. Eventually, as seawater moves in, it could contaminate plants on the surface and the region's stores of freshwater beneath.

Climate change has forced tens of thousands out. "I know I have a beautiful home," one islander says, "but ultimately it will go into the womb of the river. All we can do is try to delay the process."

North Carolina's black bears have been making headlines in the Piedmont lately. But they're also getting attention around the country.