Scaling the world’s tallest mountains is a feat in and of its own—doing it while blind is extraordinary. Erik Weihenmayer is the first blind rock climber to summit the tallest peak in every continent, Mount Everest included. At a young age, Weihenmayer was diagnosed with retinoschisis, a rare eye disease that left him sightless by age 13. But he didn’t let that hold him back from seeking out adventure, proving that what others may see as a hinderance can oftentimes be your greatest asset. Now, he’s using his incredible spirit to inspire others to live a life with no barriers.

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This story is a part of our Frontiers series, where we bring you front and center to the dreamers, pioneers, and innovators leading society at the cutting edge. Let us take you along for a trip to the oft-imagined but rarely accomplished.