1.\tThe technique was called “Vegr Minni” — way memory. Viking explorers navigated from Scandinavia to North America without compasses by creating mental “song-maps” of coastlines. Each fjord, island, and landmark became a verse in a song. They’d sing the route while sailing. The brain’s music memory centers don’t decline with age and can store unlimited spatial information when paired with rhythm and melody. 2.\tYale cognitive neuroscientists tested this in 2021. They had subjects create songs