Nearly four decades after the Chernobyl disaster, the Elephant’s Foot still sits in the bowels of Reactor 4, a radioactive relic of human catastrophe. Scientists continue to monitor the site ...

The surface pf an elephant's foot is very flexible and sensitive ... which is much lower than the human range of 20 hertz.

However, the discovery of a frozen human foot in early October has brought a partial end to a century-long search — and reignited one of the greatest mountaineering mysteries of all time.