Entirely speculative. Do with it as you will:
We know from canon that the Ancients visited Terra 300,000 years ago, collecting groups of archaic homo sapiens and canidae that they took with them as they went back out to the stars on their curious errands. We know that the Ancients destroyed themselves in a cataclysmic war a short while after that.
And we know there's a crater in Australia, Wolf Creek Crater, an 875 meter wide crater formed a bit under 300,000 years ago by the impact of a meteor estimated at 50,000 tons. Coincidence? Or, an effort to take out a small Ancient base?
We know from canon that the Ancients visited Terra 300,000 years ago, collecting groups of archaic homo sapiens and canidae that they took with them as they went back out to the stars on their curious errands. We know that the Ancients destroyed themselves in a cataclysmic war a short while after that.
And we know there's a crater in Australia, Wolf Creek Crater, an 875 meter wide crater formed a bit under 300,000 years ago by the impact of a meteor estimated at 50,000 tons. Coincidence? Or, an effort to take out a small Ancient base?