“We discovered an oxygen bottle marked with a date on it that said 1933,” he said. The bottle was marked nine years after ...

The last 5,000 feet on Everest, including its distinct black ... It is traditional to change oxygen bottles here so that one has a fresh bottle for the final ascent and return to the South Summit.

Each step higher on Everest was new territory ... On earlier attempts, Mallory had felt instinctively that to use oxygen bottles to assist breathing in the thin air was somehow unsporting.

These men are the lifeblood of the region, and without them, Everest herself would undoubtedly remain unconquered. Yet, as we hike through the national park, it’s not just oxygen bottles and ...

You're that high. Humans aren't meant to survive there. So when you are climbing there, even if you are on oxygen, oxygen is not like oxygen in a hospital. You're at a two liter flow rate mixed ...

The first successful ascent of Everest was made on May 29 ... Hikers say the terrain is littered with discarded oxygen bottles, cans, plastic wrappers and even human waste. Clean-up expeditions ...