What will it take to conserve the Path of the Pronghorn, a trail that our continent’s fastest land animal has used since the end of the last Ice Age? In a landscape as famous for its mountains as for its oil fields, WCS scientist Dr. Joel Berger is determined to find out.

After an absence from NYC since colonial times, the beaver has returned, taking up residence at the Bronx Zoo, along the banks of the Bronx River.