Dead bodies are left behind on Mount Everest, so why are hundreds of climbers heading into the ‘death zone’ this spring?

Thick murky clouds fill the sky, with freezing winds carrying snow faster than 100 miles per hour. With a frigid –30 degrees Fahrenheit temperature, life-threatening snowstorms and avalanches are frequent.

And these are typical conditions on the world’s highest mountain: Mount Everest.

The behemoth towers 29,032 feet (8,849 meters) between Nepal and Tibet in the Himalayas, with its peak surpassing most clouds in the sky.

An attempt to climb Everest requires months, sometimes years, of training and conditioning – even then, reaching the summit is far from guaranteed. In fact, more than 300 people are known to have died on the mountain.

And yet the mountain still draws hundreds of climbers who are determined to reach its peak every spring. Here’s what it takes to make the climb and what has motivated some climbers to summit the world’s highest peak.