By the 21st century, almost all of the native sports and games from Kerala have either disappeared or become just an art form performed during local festivals; including Poorakkali, Padayani, Thalappandukali, Onathallu, Parichamuttukali, Velakali, and Kilithattukali.[137] However, Kalaripayattu, regarded as "the mother of all martial arts in the world", is an exception and is practised as the indigenous martial sport.[138] Another traditional sport of Kerala is the boat race, especially the race of Snake boats.[137]