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Unlike Water, You Cannot Sink In?
The Most Efficient Swimmer In The Animal Kingdom Is?
If You Want To Dig Through The Earth To Get To China, You’d Better Start In?
The Most Efficient Wheelbarrow In The Ancient World Was Invented By The?
Which Public Service Announcement Mascot Has Their Own ZIP Code?
Which Of These Is An Unusual Source Of Humidity During Midwestern Summers?
The 1970s Oil Crisis In The United States Introduced What Automotive-Related Change?
Which Incredibly Shelf-Stable Food Was Once Quite Perishable?
Prior To The Advent Of Petrol-based Lubricants, What Was The Best Lubricant Available?
What Small Token Is Secreted Aboard NASA’s Juno Spacecraft?