Now as we all know all habitable planets in the Milky Way didn't occur naturally,but were placed there by construction companies tendering their
bids to the Milk Way Municipal Omniversal Government
There were plenty of such Omniversal Governments around
and after the Emperor borrowed money to gets the stagnating
economy going again
the Milk Way Mayor and Council found themselves with enough money
to fix a few hyperspace tunnels and replace
a few crumbling planets.
They'd sent over inspectors in the 1950s
who had sent in their report recommending that the Earth be replaced
with a new habitable planet.
So it was that a few decades later
Dragonic Construction found itself parked around Mars
with
Space Bulldozers,Space Dump Trucks,Space Backhoes and quite a few
magma rejuvenation portable power plants.
The boys all spoke Italian and Mexican and
their foremen gazed at a soon to be scraped away Earth
through long range binoculars.