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Retired Easthampton engineer builds 30-foot-tall ‘Sea Level Rise Ruler
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How long is 30 feet? - YouTube
Retired Easthampton engineer builds 30-foot-tall ‘Sea Level Rise Ruler
T. rex- EnchantedLearning.com
How Far Is 200 Feet? - Measuring Stuff
How Tall Is 20 Feet Compared To A Human?