100 Mind-Blowing Duration Facts

Cats which have blue eyes for the duration of their lives are likely to be deaf.

The world’s longest musical piece lasts 639 years. Organ²/ASLSP (As Slow as Possible) is a musical piece by John Cage that has been playing since 2001 at the St. Burchardi church in Germany. As Slow As Possible is scheduled to have a duration of 639 years, set to end in 2640.