A team of scientists in Nepal are trying to measure Mount Everest.
Everest is the tallest mountain in the world, and it's currently said to be a whopping 8,848m high!
However, its height has become a bit of a debate between scientists around the world, who think it is taller or smaller than its current measurement.
So, a group of scientists from Nepal, where the mountain is, are on a mission to try to get the most accurate measurement possible.
But just how do you measure a mountain? - and how accurate can it be?