Extreme scientists, where do some extreme scientists work? -- Exploring Earth, how do researchers explore a cave filled with water? -- Up in the air, what do hurricane hunters find in a hurricane's eye? -- The big truth!, Marie Curie, what kind of scientific research cost Curie her life? -- Working in the water, how did 19th-century scientists measure the depth of the ocean? -- The ends of the Earth, why are researchers isolated during the winter at the South Pole?