How will Felix Baumgartner skydive from the edge of space?
Felix Baumgartner is trying to be the first human to break the sound barrier without the use of a vehicle.
He'll be skydiving from a balloon 23 miles above the Earth, reaching a speedy 700 miles an hour within 40 seconds.
Earlier this year Nel went to meet him to find out how he was feeling about the record attempt.
She also found out all about the crazy science behind the jump - watch the video to see how it's all done!