history: this is the historical event that happened to cause plants to be dominant species of planet earth until humans would rise back in power.
reason: the asteroid scratched the side of the planet which made plants on that side more sentient and evolve to the point where they could walk like people
materials/biology: the asteroid was made of a radioactive material which would mutate plants and kill people
though people that survived were blessed with unimaginable powers
viewers: some survivor's that watched it from other parts of the world say it look liked it went after us
it also appears the moon would become pink for some reason