711Which animal became the first living creature to orbit the Earth, aboard Sputnik 2 in 1957?
712Who performed the world’s first human-to-human heart transplant, in 1967?
713Which country was the first in the world to legalize same-sex marriage nationwide?
714Who was the first pilot to officially break the sound barrier in level flight?
715Who completed the first solo non-stop transatlantic flight in 1927?
716Who became the world’s first female Prime Minister, leading Sri Lanka from 1960?
717Which was the first major book printed in Europe using movable metal type, around 1455?
718Which country is credited with adopting the first modern written national constitution, in 1787?
719In which year was the first successful permanent transatlantic telegraph cable completed?
720Which city became the first in the world to host the Summer Olympic Games three separate times?
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