Inside a diesel engine's cylinder, compressed air raises the temperature to ignite injected fuel, and the resulting force drives pistons to power the vehicle's main gears. Chief to this combustion mechanism is oxygen, which is in abundant supply in the air ...

Ever since they started sailing the world's waterways in the 17th century, submarines have evolved significantly in the years since. Subs are some of the most important naval vessels in any blue water navy, as they can protect surface ships while engaging ...