The cheetah is the fastest land animal on Earth, capable of reaching speeds up to 70 mph in just a few seconds. But what makes this big cat such a perfect speed machine? From its lightweight frame to ...

Fighter jets are known for their speed. America's latest aircraft, like the fast-moving F-22 Raptor fighter jet, are capable of hitting Mach 2 or roughly 1,500 mph, while the F-35 Lightning II can ...