Satw oc Novarland

When the long-form census was restored to Canada in 2016, Canadians were so excited to fill out the form that they crashed the government's website.

Written by Icelandic composer Jón Leifs in 1964, the piece called Hekla, Op 52, requires four sets of rocks hit with hammers, steel plates, anvils, sirens, cannons and metal chains to play.