Erdős’ age anecdote
Paul Erdős, the most prolific mathematician in history, always made jokes about his age. He said for instance that he is 2.5 billion years old, because in his youth the age of the Earth was said to be 2 billion years old and around 1970, it was known to be 4.5 billion years.
This is such a teacher joke
wait did the manga update???? oh god i’m not prepared, i need like 4 hours of sleep and a real dinner before i’m ready for this