The New York City subway cars taking on a second job on the ocean floor. Plus, a successful drone created using Leonardo da Vinci’s aerial screw design. And crows in Sweden are being trained to pick up litter.Sponsors:Munk Pack, Use code KRH at Munkpack.com for 20% off your first purchaseJenni Kayne, Use code KRH at jennikayne.com for 15% off your first orderLinks:Sinking 1,000 NYC subway cars in the Atlantic to create a reef didn't (Fast Company)Growing Pains for a Deep-Sea Home Built of Subway Cars (NY Times, 2008)New York's Subway Lives On in the Atlantic Ocean as Artificial Reefs (PBS Thirteen)Bye bye Brightliners: MTA's oldest subway cars bid farewell on final run after almost 58 years (amNewYork)More Than 2,500 New York City Subway Cars Are Now Artificial Underwater Reefs. See This Artist’s Remarkable Photos of Them Here (artnet)Photographing the New York City Subway Cars That Retired as Artificial Reefs (Atlas Obscura)New York City's newest oyster bed is 50,000 mollusks and 5,000 old public school toilets (Washington Post)NY State Drops Two More Vessels, Including "Chickadee" The Tugboat, Into Waters For Artificial Reefing (Gothamist)MTA Redbird Train Scrapping off Shark River Reef New Jersey (YouTube)This drone flies using da Vinci's 530-year-old helicopter design (CNET)A New Quadcopter Is Based on da Vinci's 530-Year-Old Helicopter Model (Interesting Engineering)Swedish firm deploys crows to pick up cigarette butts (The Guardian)Crows may soon be Sweden's newest litter pickers (The Local Sweden)Crows trained to collect cigarette butts on the street (Boing Boing)Latest Attraction at French Theme Park: Crows That Pick Up Trash (NY Times)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.