ON THIS DAY

Tweed Daily News - - NEWS -

1972

■ – In Ken­tucky’s Mam­moth Cave Na­tional Park, an ex­plo­ration and map­ping team dis­cov­ers a link be­tween the Mam­moth and Flint Ridge cave sys­tems, mak­ing it the long­est known cave pas­sage­way in the world.

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