That would be an excellent event to study. The ETs have likely done this more than once over huge expanses of time with different cultures. We are all a product of an ancient genetic engineering program. That's why we have over 4,000 genetic defects. They left their work intentionally unfinished to create a collectively harsher life experience for everyone here. And the reason why fair skinned people get skin cancer at vastly greater numbers is because our ET genetic engineers wanted a melting pot of races instead of just one without regard to the health of a certain portion of the population. The fair skinned races are not adapted to a star with this much UV radiation. Under the correct spectrum white skin doesn't burn like it does under our sun. That's why when they remote viewed Mars their skin was dark. The reason why we have a melting pot on this planet is to condition us to accept our differences in preparation for the time in our future where we will have to accept other races and species who are vastly different than us and many who look just like every single racial group current present on the planet. Our future is not to remain inside a spiritual prison of souls but to become a sovereign fledgling race as the program comes to an end.