On Wednesday, November 18, 2020 at 10:55:11 AM UTC-8, skybuck2000 wrote:
Aliens crashes into Earth with a Big Spaceship.

Wiping out the Dinosaurs.

A few aliens survived the crash.

Ever since then the aliens have been de-evolving into us Humans =D

Two kids per man/wife is not enough for mutations ?

Bye,
Skybuck =D

The problem with your scenario is that this event...

https://en.wikipedia.org/wiki/Chicxulub_crater

.... seems to fit almost perfectly with the dinosaur elimination event, and it left a LOT of evidence supporting itself