“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.

But when Ballinger, who previously summited Everest six times (with oxygen,) neared 28,000 feet ... "We even have our pee bottles in there because it’s too cold to go outside to pee." ...

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 ...

Experienced mountain climber Cory Richards reached the top of Mount Everest on Tuesday local time (Monday ET). Richards scaled Earth's tallest mountain without the use of supplemental oxygen and ...