Why is climbing Mount Everest so dangerous?

The recent death of Australian man Jason Kennison after reaching the summit of Mount Everest highlights how dangerous mountain climbing can be.

Ego-tourism and Mt. Everest: The hidden costs of the highest climb

Why is climbing Mount Everest so dangerous? - The Hindu

Why Is Mt. Everest So Dangerous? Traffic Jams Near The Summit Are

11 Pictures That Show Just How Dangerous Mount Everest Really Is

Why Is Mount Everest So Deadly?

Study: Climbers Twice as Likely to Reach Top of Mount Everest than

Mount Everest climbers to face new rules after deadly season

List of people who died climbing Mount Everest - Wikipedia

Mount Everest 'Death Zone': What Happens to Your Body at 26,000 Feet

What is the most dangerous mountain to climb?

Why Climb Mount Everest in the Fall

Mount Everest Is on Thin Ice - WSJ

Everest 2017: Why is the Khumbu Icefall so Dangerous? – The Blog