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VOICE ONE Welcome to THIS IS AMERICA in VOA Special English. I'm Bob Doughty.VOICE TWO:And I'm Barbara Klein. This week on our program, we explore a UNESCO World Heritage Site in the American Southwest, near the city of Carlsbad, ball valves nfl jerseys nhl jerseys mlb jerseys nba jerseysNew Mexico. Carlsbad Caverns National Park contains more than one hundred caves below the surface of the desert. Most are closed to the public. But anyone can visit the main attraction, one of the largest caves in the world.(MUSIC)VOICE ONE:Kings Palace Room in Carlsbad Cavern Huge. Incredible. Inspiring. Words like these come to mind as visitors enter a world of silence, GHD hair UGG boots cheap nfl jerseys nfl jerseys wholesale Leather Sofadarkness and cold, almost two hundred thirty meters under the ground.An elevator lowers you into the world of Carlsbad Cavern, the big cave at Carlsbad Caverns National Park. Silent, except for the voices of guides and visitors. And not completely dark. The National Park Service has enough lighting to see many of the beautiful formations all around. The temperature is about thirteen degrees Celsius. A cavern is a large cave. But Carlsbad Cavern is really a long series of chambers. One of these is called the Big Room. The Big Room is more than three hectares big. The ceiling is seventy-seven meters high. wow gold wow gold Hot water bottle buy wow gold wrapping machineThe Big Room is the single largest underground chamber ever found in North AmericaVOICE TWO:Examples of stalactites and stalagmites The Big Room and other parts of the cavern contain huge, sharp formations of minerals. People are free to explore the lit formations in the Big Room. But park rangers must guide visitors to other areas of the cave.Stalactites hang from the ceiling. Stalagmites rise from the floor.Pool ball touch screen monitor Cheap jordans linear actuator Digital photo frame Some even meet to create a column. Other formations look like needles, popcorn, pearls and flowers.A visitor still remembers the memory aid she learned long ago from her fifth-grade teacher. Stalactites have to hang on tight to the ceiling or they might fall off. And be careful about stalagmites -- you might trip over one on the floor.pa 2000 per box machinery lotro account guild wars account eve account Age of conan accounts(MUSIC)VOICE ONE:One of the first questions that visitors have is how did Carlsbad Cavern form? Guides explain that it did not result from the action of water and streams like other limestone caves. Instead, it was created by the action of sulfuric acid. The limestone developed about two hundred fifty million years ago. Then, within the last twenty million years, movements in the earth pushed the rock upward, forming the Guadalupe Mountains. Today these mountains extend from west buy age of conan account buy age of conan accounts Age of conan account Age of conan accounts AOC AccountTexas into southeast New Mexico.The action of oil and natural gas created hydrogen sulfide in the limestone. The hydrogen sulfide reacted with oxygen in rainwater moving through the rock. Sulfuric acid developed. The acid created the caves by dissolving the limestone in its path.Later, the water and most of the acid left the caves as the Guadalupe Mountains continued to rise. This permitted freshwater to move through. The freshwater left behind minerals. These minerals became the formations and shapes on the ceilings, walls and floors of the caves.AOC Accounts buy AOC account buy AOC accounts buy age of conan account buy AOC account(MUSIC)VOICE TWO:are not the only ones who visit Carlsbad Caverns National Park. About four hundred thousand Mexican free-tailed bats come to the big cave from Mexico each summer to give birth.Thousands of bats fly out of the natural entrance of the cave Every evening, as the sun goes down, thousands of adult bats fly out of the natural entrance of the cave.Age of conan account RS accounts AOC Account AOC Accounts buy Maple Story account It can take from twenty minutes to more than two hours for them all to leave. The bats fly to nearby river valleys to feed on night-flying insects. Then, toward morning, they return to the bat cave within Carlsbad Cavern. Park Service rangers explain that mother bats find their babies by remembering their location, their smell and the sound of their cry. Mothers and pups hang in groups on the ceiling. They spend the day resting and feeding.buy Maple Story accounts Maple Story accounts wow gold world of warcraft gold buy wow goldWhile the adults go out at night for food, the young bats hang out in the cave for four or five weeks. Then, in July or August, they join their mothers on these nightly flights.Finally, in late October or early November, the bats all leave and return to Mexico. But they always return the next year.(MUSIC)t is easy to imagine that it was the bats that led ancient people to discover the cave. Archeologists and others have found evidence of Ice Age hunters near the cave entrance. They have also found pieces of spear points left about ten thousand years ago.More recently,cheap wow gold ffxi gil eve isk buy age of conan accounts wholesale handbags Apache Indians painted pictures at the entrance. And evidence of one of their cooking areas was found beside a nearby path.Around nineteen hundred, a teenage cowboy named James Larkin White began to explore the cave.Jim White told his story in the nineteen thirty-two book "The Discovery and History of Carlsbad Caverns." Here is a reading of his description of his first sight of the bats and the big cave:READER: