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Opinion

The cardboard box. (The paperboard box was first commercially produced in 1817; corrugated cardboard came somewhat later).

OpinionThe bicycle. The earliest two-wheeler was invented by Baron Karl von Drais and displayed in 1817.
It is the most energy-efficient way to get from point A to point B.

OpinionThe transistor.

Opinion
The pre-printed secret ballot, also called the "Australian ballot", invented in Australia during the 1850s.



(The incandescent electric light is pretty nifty, but it has been over 200 years since Humphry Davy invented it in 1802).
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15y ago

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