Marie Curie (Discovery of Polonium and Radium)
Warsaw
Igor Sikorsky (Helicopters and fixed-wing aircraft)
Kyiv
Niels Bohr (Atomic structure and quantum theory)
Copenhagen
Juan de la Cierva (Autogyro, rotor-wing dynamics)
Murcia
Alessandro Volta (Electric battery)
Como
Linus Torvalds (Linux operating system)
Helsinki
Anders Celsius (Astronomy, Centigrade scale)
Uppsala
Samuel Morse (Telegraphy and Morse code)
Charlestown, MA
Hidetsugu Yagi ('Yagi' radio antennae)
Osaka
Rudolf Diesel (Diesel engine)
Paris
Antoni van Leeuwenhoek (Microscopy)
Delft
László Bíró (Ballpoint pen)
Budapest
Alois Senefelder (Lithographic printing)
Prague
Karl Benz (First practical modern automobile)
Mühlburg
Ibn al-Haytham (Mathematics and astronomy)
Basra
Alexander Graham Bell (First practical telephone)
Edinburgh
Robert Boyle (Chemistry and scientific method)
Lismore
Nikola Tesla (Alternating current supply)
Smiljan
Sergey Ilyushin (Aircraft design)
Dilyalevo
David Warren (Aircraft 'black box' recorders)
Groote Eylandt
Australia
Croatia
Czech Republic
Denmark
Finland
France
Germany
Hungary
Iraq
Ireland
Italy
Japan
Netherlands
Poland
Russia
Spain
Sweden
UK
Ukraine
USA
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