Kategoria:
Wiedza i nauka
Kanał:
60-Second Science
Data:
29 grudnia 2023, 21:55
Poziom:
B1-B2 (średnio zaawansowany)
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In 2013 a new user named Cleo took an online math forum by storm with unproved answers. Today she’s an urban legend. But who was she? A 2023 editor's pick.
