Men Wanted for Hazardous Journey

Urban legend has it that Ernest Shackleton placed an advertisement in the London Times that garnered 5,000 applications.
That’s not the weird part.
What is strange is that anyone – much less 5,000 people – would answer this December 29, 1913 ad which read:

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You’re Dying but You Will Live Forever

The other day I get this piece of advice from a YouTuber.
He says to subtract your age from 90.
Multiply that number by 365.
That’s approximately how many days you have left before you die forever.