The Globe reports frozen dirt under a section of the Big Dig is thawing out faster than expected, causing a cavern down there that is filling up with water.
Yes, of course there's thawing frozen dirt - engineers froze the dirt to make it easier to put in tunnel segments. State officials say nothing to worry about - the segment will act like a bridge if the underground lake gets too big - and no need to ask for legal help from an unfrozen caveman lawyer.
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