This may or may NOT be true, probably not but let's get the story rolling.
Billions of years ago there was another age of life on earth before the period known as the great snow ball earth epoch, this was a time when the
earth looked more like Hoth from the star wars imaginary (half remembered subconsciously) universe so way before that, the earth was nearly 2 billion
years old at this point and stable, it also despite lack of evidence shown by your current scientists whom have been unable to sample TRUE surface
rocks from that period and only had subcrustal rocks to sample and a few that were NOT exposed to the atmosphere at that time had a breathable oxygen
rich atmosphere.
Despite this the planet was mostly barren rocky deserts and bacteria infested seas, they were not all sulphur reducing bacteria as the atmosphere was
rich in CO2 and O2 as well as nitrogen and other familiar atmospheric gases that you know to be in it's current atmosphere.
So it was a prime target for colonization BUT it existed in a region of disputed space, call it a no man's land were certain
interstellar/intergalactic forces were NOT allowed to venture, this was because if one side claimed it then so would the other side and this would
lead to conflict, they lived and let lived but in a state of perpetual caution of one another as either multi galactic empire had the ability to
destroy the other.
At that time the Ancestors of the Terran lizards (they are not actually lizards) looked just like human's, not exactly but close enough and there
skin scales were so small you would not even have known they had any and in fact there skin was just like yours including an analogue of hair on there
heads.
They settled Terra illegally and were a rogue sect that had fled from one of the empires areas of control, that empire then to attempt to keep the
peace sent an enforcer, the enforcer whom was something of a zealot and intent on doing his duty was also extremely emotionless and driven only by a
sense of duty and loyalty to the Emperor, his ship was unusual to say the least.
They had this technology which let them take neutron stars and CORE them leaving a thin sliver were the stars equator used to be and to also keep it
from collapsing under it's own dense mass this sliver was mounted around the periphery of a huge ship that looked something like one of those old
Ring/Donut science fiction space stations but it was not for habitation, no the ring was the edge of the blade.
The ship was huge and it came to the earth then like a huge wheel it landed on the planet in one of the ocean's which barely covered it's rim and
ROLLED across the planet crushing to oblivion the illegal colony and driving any survivors deep, very deep underground, there surface colony's were
built in canyons not unlike the grand canyon of today and plant's did not yet exist but this being an earlier epoch of life there were plant -like-
species as well as huge dinosaur like creatures that were larger even than the dino's at there peak against which these canyon settlements were good
protection as they afforded both good camouflage from space observation and also from the behemoth life form's that posed a genuine threat.
the gates of these settlements looked much like your hoover damn but were mobile and meant to keep those creatures out.
But all of this afforded the ancestors of the lizards as you call them NO protection, the ring ship rolled over there settlements crushing them to
dust and only by a few of them somehow surving somewhere that the zealot enforcer did not take the ring (which was pretty much over the entire planet
as this thing even crushed proto continents into the mantle and only didn't sink into the earth itself because of the ability to negate it's own mass
and focus it were it wanted that mass to be focused).
They hid deep below and over ages mutated, they came to the surface a few times and were wiped off the face of the earth but never in such a manner
again, some say the ancient destroyer is still here somewhere sunk into the earth itself with the long dead or perhaps dormant enforcer suspended in
time but others say it went back to the galaxy that used to be the heart of the long dead empire from which it had been sent.
OR I could just be talking a load of crap and really feeling like a Chicken and stuffing butty about now as this thread is a great excuse for some
sci fi.
edit on 30-1-2021 by LABTECH767 because: The reason they did not simply destroy the offending planet to prevent colonization by dissidents
and other undesirables was because that too would have been seen as a provocation against the other empire and other dangers that also laid potential
claim to the sol system at that time.
edit on 30-1-2021 by LABTECH767 because: Hay space age STEAM ROLLER, if you were standing on
the planet looking at that thing it was so large that while it looked narrow from a distance it was miles wide and the top of - part of the rim not on
the planets surface was above the edge of the atmosphere, the control/cockpit was in the very centre in a hug linked to the outer rim by huge
spokes