Chris Abrahamsen

Officials are shoring up water systems infiltrated by the golden mussel. Dogs and human inspectors are checking boats at some lakes, but a patchwork of oversight leaves many lakes unprotected. “There’s just too many boats and too many people out there,” one warden said.

Stream now with the PBS app + YouTube. Why are zoos, aquariums, and labs sometimes the key to saving critically endangered wildlife? In dire straits, creating healthy captive populations is the best course to save these species in the wild. Captive breeding allows these facilities to quicken the reproductive process and carefully preserve genetic diversity. And when successful, these breeding programs can set endangered species on a long-term path to recovery back in the wild.

Un juez federal le prohibió a la administración Trump utilizar su prohibición de entrada al país para impedir que 80 refugiados ya verificados ingresen a Estados Unidos.

Earlier this month, the government websites that hosted the authoritative, peer-reviewed national climate assessments went dark. Officials say they're only obligated to give the reports to Congress.

Abrams isn't running for office — but she's not ruling it out, either. "Politics is a tool ... for getting good done, but it's not the only one." Her new thriller is Coded Justice.

Why are zoos, aquariums, and labs sometimes the key to saving critically endangered wildlife? In dire straits, creating healthy captive populations is the best course to save these species in the wild. Captive breeding allows these facilities to quicken the reproductive process and carefully preserve genetic diversity. And when successful, these breeding programs can set endangered species on a long-term path to recovery back in the wild.