The trench warfare of WWI led to new inventions in weaponry - the tank is still used today, but this gun helmet never caught on.
Catch the world's first real glimpse of one of the earliest helicopters ever invented.
The Re-Inventors try to improve on Da Vinci's early design for an automatic weapon.
The trench warfare of WWI led to new inventions in weaponry - the tank is still used today, but this gun helmet never caught on.
This 1897 design for a new alternative to the bicycle never caught on, but the Re-Inventors race to see if it's an improvement or a disaster.
With the rise of traffic in congested cities, The Re-Inventors dig up old models to speed through traffic.