Wyrdness on 14 February 2016
With this theory all the creatures around now or most of them would have to also be aliens. Some animals also become extinct by being too efficient in their role as well like a group carnivore that has reduced its preys numbers to such a point the group begins dying out because the isn't enough food source, another thing is animals like chimps display traits that are also out of sync, for example they are the only other animal that will go to war with rival groups even if they have everything they need in their own territory they will seek out and forcefully take over other areas.
