Space/Science — HabitableZone

Space/Science » in reply to re: The hole is in APOD, today! - It's not just the large one, but there are a few other smaller ones.

re: The hole is in APOD, today! - It's possible that...

.... some meteors struck the surface enough to penetrate existing lava tubes.

MOLA may still hold the answer... or a future probe...

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