The Classic Tetris World Championship final is this Sunday, streaming live online, and if you were also surprised there is a Classic Tetris World Championship, then have I got a documentary recommendation for you. Archaeologists have discovered tens of thousands of Ice Age paintings on a remote cliff in the Amazonian rainforest. And a Christmas song that has been designed especially for dogs.Sponsors:CastleGrade, Enter code KOTTKE for 10% off at CastleGrade.comStoryWorth, Get $10 off your first purchase at StoryWorth.com/ridehomeLinks:Best of Five: The Classic Tetris Champions (Kickstarter)Ecstasy of Order (earlier documentary from 2013) (Kottke)Why Are Humans Suddenly Getting Better at Tetris? (Kottke) CORRECTION: The finals are on Sunday the 6th, not Saturday. Learn more here: Classic Tetris World Championship (CTWC)'Sistine Chapel of the ancients' rock art discovered in remote Amazon forest (The Guardian)Christmas music for dogs is now a thing; 'Raise the Woof' is 'first-ever' holiday single aimed at canines (CNN)USPS Operation Santa® (USPS) Dear Santa (IFC Films)Kottke.OrgJackson Bird on TwitterSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.