Don't get too comfortable, puny human. You may be perched high on your planet's food chain right now, but it won't last forever. There are plenty of races waiting for their chance to assimilate you into their culture, usually by killing you. Whether they're in deep-space hibernation, hiding under the surface of your world, supposedly "extinct" or latently waiting on the internet, it's only a matter of time before a superior form of life makes you its bitch.
But with so many sources of imminent demise, which one should you worry about the most? Well, you could try doing literally hours of research and science, but something will probably enslave or kill you before you finish. That's why GamesRadar has compiled an irrefutably accurate list of the races, creatures and things most likely to make a grab for humanity's "Most Superior Race" championship belt.