Template:Are You Sure/April 21: Difference between revisions

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• ... that engineer and inventor '''[[Richard Trevithick (nonfiction)|Richard Trevithick]]''' was a pioneer of steam-powered road and rail transport, and that he developed the first high-pressure steam engine?
• ... that physicist, astronomer, and mathematician '''[[Jean-Baptiste Biot]]''' establish the reality of meteorites, made an early balloon flight, and studied the polarization of light?
 
• ... that the '''[[The Waking of the Slate|Waking of the Slate]] is a tradition in the Welsh slate mining industry, and that
the slate is traditionally woken with reveille call on bugle?

Revision as of 05:04, 21 April 2022

• ... that physicist, astronomer, and mathematician Jean-Baptiste Biot establish the reality of meteorites, made an early balloon flight, and studied the polarization of light?

• ... that the Waking of the Slate is a tradition in the Welsh slate mining industry, and that the slate is traditionally woken with reveille call on bugle?

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