The Successor

As far as what the scientist have been saying we are obliged to believe those facts as true. According to the scientists human is the successor of dinosaurs. There are so many living creatures along with the humans in this earth and which of them will take over humans after the possible Armageddon (which is for sure to happen). The research says that Cockroaches will take over human and there will only be cockroaches in this planet. Could this be true? No way…. Probably there used to be so many other living creatures when the dinosaurs existed and none of those are alive today. So how can cockroaches be here when all the creatures will be gone one day in the future?