Between 1939 and 1941 Detective Comics and its sister company, All-American Publications, introduced popular superheroes such as Batman and Robin, Wonder Woman, the Flash, Green Lantern, Doctor Fate, the Atom, Hawkman, Green Arrow and Aquaman.[7] Timely Comics, the 1940s predecessor of Marvel Comics, had million-selling titles featuring the Human Torch, the Sub-Mariner, and Captain America.[8] Although DC and Timely characters are well-remembered today, circulation figures suggest that the best-selling superhero title of the era was Fawcett Comics' Captain Marvel with sales of about 1.4 million copies per issue. The comic was published biweekly at one point to capitalize on its popularity.[9]