The highest mountain discovered is the Olympus Mons, located on Mars.
Its peak is 16 miles high, making it nearly 3 times higher than Mount Everest
2020
Kangchenjunga, the tallest mountain until a survey of Everest, has never been fully climbed.
The first people to reach the top stopped short of the summit because they promised the ruler of Sikkim to keep the sacred mountain intact
2020
