This plane is trying to fly to 90,000 feet without an engine

But, how does it work?

Updated: 

This aircraft is part of the landmark mission to fly higher than any plane ever before

The crazy part is that the plane doesn't even have an engine.

See also: This is why NASA intentionally crashed a plane

See also: Why this drinks order is most annoying for flight attendants

It's a glider designed to move up 400 miles an hour and eventually reached 90,000 feet, more than twice the cruising altitude of the typical passenger plane.

The plane surfs the skies on what are called 'stratospheric mountain waves'.

Jim Payne, the chief pilot, is in Argentina right now preparing for the next flight.

They've chosen the Argentinian Andes because it's one of the few areas in the world where they can find the waves of wind that they'll need to climb to new heights.

Strange things you didn't know about your flight

Strange things you didn't know about your flight