Like positive and negative, or debit and credit, matter and antimatter are equal and opposite. So if matter falls down, does antimatter fall up? Chloé Malbrunot investigates that question by placing two atoms — one made of matter, and the other antimatter — in the cockpit of a plane, ready to jump. What do you think will happen? View the full lesson here

This is the final video in the series created by TEDed and CERN for this year's TEDxCERN event held on 25 September 2014.

For more info on this years event see the TEDed website where the videos for this year’s talks will soon be available.