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Everest Lost on Everest
What happens to your body when it's exposed to extreme altitudes? How does the lack of oxygen affect the brain? If there were a mountain higher than Everest, would humans be capable of reaching the summit? Find the answers to these questions and much more.

Hear the Experts | Mountain Gear: Then & Now | High Exposure: Epilogue
Test Your Brain | Higher than Everest? | Climbing without Os
How the Body Uses 02 | Pressure on Earth



Lost on Everest | High Exposure | Climb | History & Culture | Earth, Wind, & Ice
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