The future of the spaceships
A very interesting theory and popularized with simple explanations, and good illustrations. Thanks the youtube channel TED-Ed, this videos explains the future of the spaceships in contrary of what we thought, they will be very small, and they will be send in space like a swarm. You asking why ? This is for the propultion, they don't take a lot of energy with an ingenious system, I let you discover how !