A visit to Chernobyl.
South Carolina; goldenrod field; insects.
Texas; Santa Ana National Wildlife Refuge; the Rio Grande; birds.
Wrangell-St. Elias National Park; glaciers; rivers; wilderness.
South Carolina; Francis Marion National Forest; Boneyard Beach; Bulls Island; Cape Romain National Wildlife Refuge.
Jackson Hole, Wyo.; Grand Teton National Park; buffalo; moose; elk; Snake River.
New Mexico; Bosque del Apache National Wildlife Refuge; eagles; snow geese; sandhill cranes; Chihuahuan Desert.
Arizona; Saguaro National Park; the Sonoran Desert; cactus.
Alaska; Denali National Park; grizzly bears; caribou; moose; Mount McKinley.
Wyoming; Yellowstone National Park; geysers; waterfalls; wildlife sanctuaries.
South Carolina; Congaree Swamp National Monument; canoeing; Cedar Creek.
Maine; Acadia National Park; Cadillac Mountain; beaches; Schoodic Peninsula.
Texas; Aransas National Wildlife Refuge; birds.
South Carolina; Old Santee Canal.
Clearwater, Fla.; osprey; owls.
Georgia; Okefenokee Swamp.
Pennsylvania; hawk migration; fall foliage.
Colorado; Rocky Mountain Arsenal National Wildlife Refuge; prairie dogs; rabbits; mule deer.
Florida; St. Joseph Peninsula State Park; beach; sea life.
New York; Montezuma National Wildlife Refuge; glaciers; marshes; bald eagles.
Colorado; Rocky Mountain National Park; elevation changes plant and animal communities.
South Carolina; Savannah River; ecology.
Ohio; ecosystems; snakes; butterflies.
South Carolina; Blue Ridge Mountains; Atlantic coast.
Roswell, N.M.; moving sand dunes; limestone caves; forests.
The Great Smoky Mountains National Park; wildflowers; butterflies.
Nature walk; pelicans; roseate spoonbills; freshwater environment.
Mountains; sea; wildlife refuge; Saluda River; swamp; Carolina Bay.
South Carolina; island; forest.
Dinosaur tracks; Texas.
Nature walk; South Carolina; mountains; forest; streams; animals.
Texas; wildflowers; wildlife.
Peninsula in Alabama.
Variety of mammals.
Idaho; volcanic rock.
Basin in Oregon.
Plants in South Carolina.
Plants in Massachusetts.
Basin; marsh; beach.
Blue Ridge Mountains; Nantahala.
Plants in Nebraska.
Plants and animals along the Missouri River.
Beachcombing in North Carolina.
Habitats in the Appalachian Mountains.
Woodpecker; national forests.
Rain forest in Costa Rica.
Desert; Phoenix forest.
Banff National Park; glacial activity.
Cactuses; desert blooms.
Nature trail; zoo; plants.
Rain forest in Costa Rica.
Jasper National Park in Canada.
Costa Rican forest.
Panhandle; Nebraska; Oregon Trail.
Zion National Park: rock formations; flora and fauna.
Santee National Wildlife Refuge: flowers; birds; alligators.
Erosion creates Bryce Canyon.
Cape Breton: geology; moose; pilot whales; bald eagles.
Carlsbad Caverns: formation; wildlife.
Sandy Point: nesting birds; beachcombing.
Bay of Fundy: tides; fossils.
Flowering plants of the Smokies.
Hurricane Andrew's impact on the Everglades; wading birds.
A limestone fossil reef; desert.
A Louisiana coastal marsh; alligators; birds; nutrias.
The Laguna Atascosa National Wildlife Refuge; green jays; indigo snakes; wading birds.
Wildlife preserve in Florida.
Florida; Paynes Prairie State Preserve; wildlife.
Alaska; Kenai National Wildlife Refuge; Denali National Park and Preserve; Mount McKinley.
Virginia; Chincoteague National Wildlife Refuge; migratory birds.
South Carolina; Bulls Island; Hurricane Hugo.
Massachusetts; Cape Cod National Seashore; beech forest; Atlantic white cedar swamp.
Oregon; Crater Lake; Mount Mazama; Wizard Island; plants and animals.
California; Death Valley National Park; Dantes View.
Alaska; Denali National Park and Preserve; grizzlies; caribou; moose; wolves.
Kentucky; underground caverns; mountain woodlands.
Alaska; Kenai National Refuge; moose; caribou.
Mount St. Helens; wildlife.
Sequoia National Forest; glacier-torn caverns; mountain streams.
Golf course; red-shouldered hawks; butterflies.
Mammoth Hot Springs; Hayden Valley; Lower Yellowstone Falls; Madison River.
A bristlecone pine forest in southern Utah.
A boreal forest in Vermont.
Wild horses, bison, prairie dogs in North Dakota.
Rare birds, fern forest, lava tube at Hawaii Volcanoes National Park.
The Capitol Reef National Park of Utah.
The Venus flytrap at Lake Waccamaw.
Hot springs, geysers, mud volcanos at Yellowstone National Park.
Mount Washington endures severe weather.
The Custer National Forest of Eastern Montana.
A dormant volcano houses rare plants and animals.
Fort Jackson's wildlife sanctuary.
Animal artifacts found on hikes during the past decade.
The Allegheny Mountain range reflects fall colors.
The Wasatch Range of the Rocky Mountains.
Connecticut's hemlock forest; Eight Mile River; Chapman Falls.
Bald eagles and red-tailed hawks co-exist in the Chupadera Mountains, N.M.
The habitat of Siberia, Russia.
From Russia; Alexander Park; St. Petersburg; Gulf of Finland; Talga Forest.
Fall wildlife of Bombay Hook National Refuge.
Searching for fossils near Kemmerer, Wyo.
Bird life of Trustom Pond, R.I.
Lava flows in Tularosa Valley, N.M.
The hike begins on White Top Mountain, Va.
Plant and animal life in Big Bend National Park.
Nature survives in an urban lot.
Jim and Rudy hike Adirondack trails in fall.
The naturalists show favorite items collected.
A Wisconsin refuge features wetlands and nesting birds.
Glacial rocks and dinosaur tracks of Mount Holyoke.
Red cedars of Coeur d'Alene National Forest in Idaho.
Animal-shape mounds in Iowa.
Wassaw Island, a barrier island of Georgia.
Missouri's Mingo National Wildlife Refuge.
Rare life on Forty Acre Rock in South Carolina.
Rare birds of the Santa Ana National Wildlife Refuge.
Birds of Reelfoot Lake in Tennessee.
Goats, mule deer and marmots at Glacier National Park.
Jim Welch and Rudy Mancke study plants, animals and history of the Riverbanks Zoo in Columbia, S.C.
Jim Welch and Rudy Mancke investigate damage wreaked by Hurricane Hugo on Bull's Island, S.C.
Waterfowl and geology of Pyramid Lake in Nevada.
Loons; eagles; ospreys; whooping cranes.
Plants and animals of Ohio parklands.
South Carolina limestone quarry.
The Blue Ridge Mountains; Raven Cliff Falls.
Superior National Forest in Minnesota.
Snakes and butterflies of Kelleys Island in Lake Erie.
Life on an island in South Carolina's Lake Murray.
Crab Orchard National Wildlife Refuge in Illinois.
Mule deer, ospreys and other animals near Lake Tahoe.
Creatures of Indian Cave State Park.
The Klamath Mountains of Oregon.
Baxter State Park, home of Mount Katahdin.
Glaciers once covered Acadia National Park.
Coastal redwoods; Roosevelt elk.
Gypsy moths destroy hardwood forests.
Creatures of the Kentucky-Tennessee border.
Hurricane Hugo hits Bull's Island, S.C.
Several habitats exist in Bull's Island, S.C.
Birds, reptiles and amphibians.
Canada geese; moose; hawks.
The Smoky Mountains support diverse flora.
A wildlife refuge coexists with Cape Canaveral.
Seas once covered a portion of Tennessee.
Wildlife flourishes in southern New Jersey.
Bison roam South Dakota's Black Hills.
A waterfall drops amid unusual rock formations.
Strange plants surround unusual rock.
Exploring a marsh and beach.
Lush vegetation borders a historic trail.
Pitcher plants, Venus' flytraps and butterworts.
Cooled liquid rock forms massive columns.
Plants and animals adapt.
Wildflowers thrive in an Alabama canyon.
Shells; the Ding Darling Wildlife Refuge.
Fossils lie under eroded South Dakota plains.
Vegetation flourishes in Georgia's 'wet prairie.'
Sand dunes shelter flowers and support grass.
Finding fossilized dinosaur bones in Colorado.
Creatures prepare for winter.
A Texas barrier island.
Discovering 400-million-year-old fossils.
Glaciers' work in Colorado.
Exploring a river-bottom forest.
Exploring the geological past of Kansas prairies.
Exploring a 68-foot Kentucky waterfall.
Water forms canyons in rock.
A wintry day in the Appalachian Mountains.
A Washington state temperate rain forest.
Wildlife abounds at an Arizona desert oasis.
Plant types vary near a Florida river.
Past and present merge on a South Carolina plantation.
The unspoiled beauty of the Arkansas area.
Wind, sea and weather form a contoured landscape.
Life at various altitudes.
Trawling along the South Carolina coast.
The beach boasts dune formations and white sand.
Geological formations of the underground caverns.
Beautiful landscape surrounds Mount Rainier.
Desert plants and animals.
A scenic walk down a mountain road.
Plants and animals adjust to their environment.
Men modify Florida's Lake Okeechobee.
Geology of Vermont's Mount Mansfield.
Plants and animals of a magnolia forest.
Plants and wildlife of North Carolina mountains.
Wildlife and vegetation abound in a swamp.
A diversity of life flourishes in the Everglades.
Creatures of an Atlantic beach.
Contrasts plants and animals of forests and fields.
Geology and animal life of Vermont's Button Bay.
Life in a South Carolina wildlife sanctuary.
Plants and animals of coastal North Carolina.
A fall trek through Carolina mountains.
Indigenous and imported plants and animals inhabit cities.
A canoe trip.
Life on the swamp's floating islands.
Wildlife in the Magnolia Gardens of Charleston, S.C.
Five carnivorous plants of South Carolina.
Eastern U.S. birds and endangered species.
Change and adaptation on a barrier island.
Scrutinizing plant anatomy in a hardwood forest.
Examining fossils in a limestone quarry.
Following the North Carolina river's course.
Interrelationships of ocean and shore life.
Refuge life thrives.