The Hidden World
A diverse collection of volunteers walks and wades through Maryland's thousands of streams each year, collecting data that ultimately tells the story of the state's water quality.

Autumn Promise
There aren't many Whooping Cranes left alive in the world. That's why the work of scientists at the Patuxent Wildlife Research Center in Laurel, Maryland is so important. They're teaching baby cranes to migrate each autumn from Wisconsin to Florida - by following a small, ultralight airplane - in the long-term hope that the birds will breed and expand their numbers.

Saving Bay Country
Many say the modern environmental movement was born with the publication of Rachel Carson's "Silent Spring." Four decades have passed. Is the environmental movement still on course?