Gatsby, Marvin the Martian, and Schrödinger Musk has tweeted about a string of other pets he owns on Twitter, including two dogs and a cat. In 2018, he tweeted: "We have a big dog called Gatsby, a little dog called Marvin the Martian & a cat named Schrödinger." The name Schrödinger refers to the infamous thought experiment created by Erwin Schrödinger in the 1930s. Gatsby and Marvin have even visited the famous dog whisperer Cesar Milan, who posted a picture of them on his Instagram in 2018. Elon has also tweeted "Ai is Schrödinger's code recently"