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A fact from Martian lava tube appeared on Wikipedia's Main Page in the Did you know? column on 13 April 2014, and was viewed approximately 60 times (disclaimer)(check views). The text of the entry was as follows: "Did you know
... that 7th-grade science students at Evergreen Middle School in Cottonwood, California, helped researchers discover a new series of Martian lava tubes(pictured)?"
Why doesn't the article mention anything about this most important quality? It says that they're "several meters" under ground and that humans and other living things could live there, but are those tunnels like 2 m tall, 100 m tall, or what? GMRE (talk) 14:46, 13 April 2014 (UTC)
It's a good point, I added the width-depth reported on the recently discovered skylight, looks like it's over 100 metres (330 ft) across. This is quite a bit bigger than the only lava tube I have first-hand experience with, Ape Cave which is maybe 10–20 meters. — Brianhe (talk) 16:15, 13 April 2014 (UTC)