You would think this is because humans are particularly tricky prey, but it turns out the reason they hunt us obsessively is down to the mysterious Earth markings known as the Nasca lines. They've taken on Batman no less than three times, had a go at Tarzan, picked a fight with Judge Dredd, wiped out a Russian science station and generally got up to some serious mischief. As if taking down a commando team and half of LA's criminal underground in the two Predator films wasn't enough, their comic-based exploits have been truly prolific.

Unfortunately, that doesn’t make any sense because the Predalien only exists within the Alien vs Predator universe–meaning the first official Alien vs Predator series accidentally created a plot hole that made the existence of the Predalien (arguably the most iconic and unique creature to come from the franchise) utterly impossible.Just what is it that marks Earth as a happy hunting ground to the Predators? These intergalactic hunters seem to spend half their lives on Earth, slashing and hacking their way through the populace at will. The fact that the Xenomorphs looked as though they just popped out of a group of humans rather than taking on traits from the rhino-like cattle they were growing inside means that, within Alien vs Predator’s continuity, Xenomorphs didn’t originally have the genetic imprint ability, indicating that it didn’t matter what host was chosen by the Facehugger–every Xenomorph was going to come out the same anyway. Another example of the genetic imprint in-action is–quite obviously–the Predalien, which was a result of a Predator being impregnated with a Xenomorph. One example of this is in the film Alien 3, when a Facehugger impregnates a dog (or ox, depending on the version of the film) and the resulting Xenomorph is much more animalistic than the ones shown in the two previous movies. This is why Xenomorphs can take on drastically different appearances based on the Facehugger’s chosen host. Xenomorphs only look the way fans are most familiar with because they are usually born from humans, meaning human DNA is mixed with the biological material implanted by the Facehugger in a process known as DNA reflex (also referred to as genetic or biological imprint).

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