Tons of human waste dumped into crevasses on Mt. McKinley’s glacierscould surface in the next two decades, according to scientists from Alaska Pacific University. Glaciologist Mike Loso says that the estimated 65 tons of solid waste will work its way to the bottom of the glacier in the next 15 to 25 years. But while the droppings will still be full of illness-causing bacteria like fecal coliform and E. coli, it won’t likely pose a threat to human health. “We could do the math and figure out how many kilograms of bear poop are out there and we’d come up with a huge number too,” Loso said. Climbers on the peak are required to carry out waste in Clean Mountain Cans lower on the peak, but can dump it in crevasses higher on the mountain.