Hope you're enjoying your Sunday! Here are the things I found fascinating and useful this week. First, some fun news:

Katherine Kartis


  • You should quit cashmere and turn to alpaca. It's just as soft, more durable, and much more sustainable.




  • There's a new kind of stone that scientists have identified, and it's made out of plastic. Millennia from now, it might even serve as a geologic record of our time.
  • The pioneering electric car company Tesla has decided to open up all its patents to anyone who wants to use them. "Given that annual new vehicle production is approaching 100 million per year and the global fleet is approximately 2 billion cars, it is impossible for Tesla to build electric cars fast enough to address the carbon crisis. By the same token, it means the market is enormous. Our true competition is not the small trickle of non-Tesla electric cars being produced, but rather the enormous flood of gasoline cars pouring out of the world’s factories every day." Read the rest of the letter from CEO Elon Musk.