Two men climbed Mount Everest 21 times, there is a dispute about its exact height and it is still growing. Also, the mountain actually has several names, it is the world's dirtiest mountain and it's not the world's tallest mountain.
Himalayan jumping spiders hide all over Mount Everest. This makes them one of the Earth's highest permanent residents. Climbers have spotted the spiders, which feed on stray insects, at up to 22,000 feet.
Apa Sherpa and Phurba Tashi, two sherpas, have each reached the summit of Everest 21 times. This gives them the joint record, as of 2015.
Determining the exact height of Mount Everest depends on which side of the border an individual stands. China states that the peak is 29,016 feet high, while Nepal says it is 29,029 feet tall. However, in 2010 they came to an agreement and officially list it using Nepal's measurements. In 1994, a research team discovered that Everest continues to grow at about 4 millimeters a year.
Nepalese people call the mountain Sagarmatha, while Tibetan natives call it Chomolungma. Mount Everest is not the world's tallest mountain, however. Mauna Kea, an inactive Hawaiian volcano, holds that title. Mount Everest is also home to an estimated 50 tons of waste left behind by climbers.