sciencehabit writes "What may look like mere scratches is much more. A 900-year-old Viking code known as jötunvillur has been cracked. The code-cracker, runologist Jonas Nordby from the University of Oslo, deciphered the system after realizing he needed to replace the original runic character with the last sound used to pronounce it. For instance, the runic character 'k' is pronounced 'kaun,' so k becomes n. Nordby believes secret messages were created by the Vikings for entertainment. One piece of wood reads: 'Kiss me.'"