The top documents tagged [lava flow tubestop]

Lavatube “skylight” “pits” on Moon & Mars Their abnormal shadow patterns stand out in high-res photos.

Lavatube “skylight” “pits” on Moon & Mars Their abnormal shadow patterns stand out in high-res photos.

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Lavatube “skylight” “pits” on Moon & Mars Their abnormal shadow patterns stand out in high-res photos

Lavatube “skylight” “pits” on Moon & Mars Their abnormal shadow patterns stand out in high-res photos

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