The problem with the end of the world is that success is bad. Unfortunately scientists are blowing holes in some of the better ways the Earth could be wiped clean of the heathens. This time asteroids and killer tidal waves took a turn for the worse. Sorry to report, this won't kill us.
New research is showing that big asteroids hitting in the ocean won't drown us in a tidal wave. That's bad news for doomsayers with cosmic predictions. It means you need a super killer asteroid rather than the more abundant mountain sized rocks. Most of the space trash out there is no longer be of sufficient world ending quality.
Anybody see reverse parallels to redefining obesity? You know, change a little number and suddenly half the world is now fat? This is the reverse because all those killer asteroids are now anemic weaklings.
We'd still have issues, but we won't all be underwater. Sure a dino killer will cause problems. The is assuming dinosaurs actually existed to get destroyed and they didn't if you are on the creation side of the end of the world debate. If you believe in evolution, sure, we can still snuff it like they did.