841Which astronomer discovered that the universe is expanding, with a famous space telescope later named in his honor?
842Which Russian physiologist is best known for his research on classical conditioning, famously demonstrated using dogs?
843Which German geophysicist first proposed the theory of continental drift, suggesting continents were once joined together?
844Which American inventor developed the vulcanization process that made rubber far more durable and useful?
845Which American inventor developed Morse code and helped pioneer the electric telegraph?
846Which Italian physicist invented the first true electric battery, known as the voltaic pile?
847The unit of electric current, the ampere, is named in honor of which French physicist and mathematician?
848The unit of electrical resistance, the ohm, is named in honor of which German physicist?
849The unit of energy, the joule, is named in honor of which English physicist known for his work on energy conservation?
850Which English physician is credited with correctly describing the circulation of blood pumped by the heart?
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