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are a social species

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and mastodons

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In contrast

Classic Motorcycle Triumph Pierre Four Souvenir Sheet of 2 Stamps Mint NH Beethoven are a social speciesClassic Motorcycle Triumph Pierre Four Souvenir Sheet of 2 Stamps Mint NH The history of the motorcycle begins in the second half of the 19th century. Motorcycles are descended from the "safety bicycle," a bicycle with front and rear wheels of the same size and a pedal crank mechanism to drive the rear wheel. Despite some early landmarks in its development, the motorcycle lacks a rigid pedigree that can be traced back to a single idea or machine.