I was wondering about Dumbledore's age. What justifies that he's so old, as described in the books and websites. My first guess was that he owns one of the Hallows, but then, how could Abelforth be that old ans alive too?
Then I came across this question What age did Dumbledore live to? and notably the first answer, stating that JK Rowling says that "Wizards have a much longer life expectancy than Muggles. (Harry hasn't found out about that yet.)". This would render Dumbledore longevity not that impressive at all...
Do we have any more information about Wizards life-span? And how come that every pure blood kid seems unaware of that too?