Every year hundreds of people try to climb the world's highest mountain or walk through rainforests（雨林）. Let's take a look at two of the 21st century's（世纪的）greatest adventurers（冒险家）.
A mountain climber
Do you know that more than 4，000 people have climbed Mount Everest？Gerlinde is one of them. She is one of the world's greatest climbers and has climbed all the mountains over8，000 meters in the world. It's difficult to climb mountains in cold weather，but Gerlinde loves it. She started climbing the mountains near her home as a teenager. When she left school，she became a nurse but always went climbing in her free time.
An Amazon adventurer
Ed Stafford is the first person to walk along the Amazon River from the mountains of Peru to the mouth of the river in Brazil. His journey took two years and four months. There are many dangerous animals in the rainforest. But Ed was lucky and he was only bitten（咬） by small insects（昆虫）. On his trip，Ed had to look for fruit or catch fish each morning. Sometimes food was hard to find and Ed was often tired and hungry. So he used a radio to ask the people of the rainforest for food and help.
