Futuristic plane designs revealed
10 July 2014 Last updated at 08:37 BST
Futuristic plane designs have been revealed by aerospace company BAE Systems.
The ideas being worked on include planes that can "dock" together to provide more efficient flight.
There's also a rescue plane which has a 3D printer on board, so it can print the right device needed in every situation.
At the moment all the designs are just ideas, but they could be developed by 2040.