Palya

One palya is the length of time it takes to build a cube of lambswool 1 (or possibly 100) yojans high (between 4 and 9 miles or 6.4 km and 14.5 km), if one strand was laid down every century.It has also been defined as the length of time it would take a little bird to empty a well one mile square full of fine hairs, if it carried away one hair every hundred years.