This dimension groups energy pioneers by nationality. Wikipedia defines nationality as "the legal status of belonging to a particular nation." Browsing this way collects every pioneer from the same country.
Facts
Comparison
Era of Emergence United States
Sources
1. Internal combustion engine - Wikipedia
History, Otto engine 1876Quote, History, Otto engine 1876
The first modern internal combustion engine, the Otto engine, was designed in 1876 by the German engineer Nicolaus Otto.
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