Leland Melvin is a unicorn of a human being. He's been drafted to the NFL, flown in the final frontier (twice), and now, written a book called Chasing Space. On the internet, the former NASA astronaut is best known for this unforgettable photo with his two dogs, Jake and Scout, who grace the cover of his new memoir. Gizmodo sat down with Melvin to talk about diversity in STEAM fields, education and, of course, Good Dogs in Space.