#21 La Decuplette: A 10-Person Bicycle from 1898

#22 The Antikythera Mechanism: Ancient Greece’s Complex Clockwork Marvel.

#23

#24 Amphicar: The Car That Drives on Water

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#26 Leonardo da Vinci's Mechanical Knight: A Vision of Robotics

#27 Adjustable Mannequin from the 1851 Great Exhibition

#28 Flying Cars: A Futuristic Dream Turned Reality

#29 The Runcible Spoon: A Curious Hybrid of Utensils

#30 Difference Engine: The Birth of Modern Computing

#31 The Nimrud Lens: Assyrian Optics Innovation

#32 Altai, Russia’s First Mobile Phone, 1963: Bridging Mobiles and Landlines

#33 Finally Settled: 1891 Inventor's Notes End the Debate

#34 Warren Safety Helmet, Revolutionizing Protection Since 1912

#35 The Dynasphere: A Futuristic Monowheel Design

#36 Ancient Water Clocks: Measuring Time with Flowing Precision

#37 Talking Doll: A Revolution in Toys

#38 Pump-Assisted Washing Machine by E. Koers, Netherlands, 1951

#39 Firefighters Showcase James D. Halloran's Smoke Mask, NYC, 1911

#40 German Soldiers with Early Sound Locators for Enemy Aircraft, 1917