In July of 1976, newspapers around the world reported that Nadia Comăneci scored the first 10 in Olympic history.
Nadia Comaneci, a 15‐year‐old Rumanian girl, scored the first perfect 10 in Olympic gymnastic history in the women’s uneven parallel bars competition.New York Times, July 19, 1976
Nadia received a perfect score of 10.00 — the first perfect 10 in Olympic history.The Daily Yomiuri, July 20, 1976
Unfortunately, what they reported was wrong.
Comăneci was the first female gymnast to score a 10 in Olympic history, but she was not the first gymnast to score a 10. (To be fair, information was much harder to come by in the 1970s.)