Here's a rather contentious DC fact! Diana's romantic interests included both men and women when she was created in 1941. It's understandable when your identity is defined by your struggle with love and you're from an island populated entirely by women. Her creator, William Moulton Marston, was particularly inspired by his polyamorous situation. By the way, this was in 1940, when homosexuality was illegal.

Those who believe they are the most intelligent in the DC universe appear to be doomed to miss the more obvious secrets. Lex Luthor finds it absurd that Clark Kent, a mild-mannered reporter, could be his arch-nemesis in this case. Because of his hatred for Metahumans, he finds it difficult to believe that one can live a normal life.

In 1938, Jerry Siegel and Joe Shuster, the young cartoonists who created Superman and launched the superhero comics craze, sold the character and all rights to the publisher for $130. In turn, the character would make billions for DC Comics and Warner Bros. through comics, movies, licencing, and other means. Siegel and Shuster filed multiple lawsuits against the company for proper royalties in the decades following the character's debut, with little success. Though the duo would later receive medical insurance and yearly stipends from the company, they never saw the type of money they had hoped for.

Here's some interesting DC trivia for you superhero fans! Because of a legal dispute, DC's Captain Marvel is also known as "Shazam." When Marvel learned that DC was planning to resurrect an old hero named "Captain Marvel," they swooped in with a copyright for their own "Captain Marvel" before DC could complete all of the paperwork. That's when Detective Comics decided to rename its hero "Shazam."

Perhaps he is the king (or queen) of diplomatic blunders. When Wonder Woman was illegally detained by the Department of Metahuman Affairs, Hippolyta devised a plan to invade Washington, D.C. and murder everyone in sight. Sure, it was a Circe manipulation plot, but that was a little far-fetched! In fact, the series was panned for its violent and gruesome nature – after all, it's not every day that DC fans read about Amazons murdering innocent children in Washington.

True trivia that may break a few hearts: when the Joker first appeared in 1940, he was supposed to be a one-off event that would disappear after a few incidents. Fans were so taken with his character, and they appreciated how brutal and unpredictable he was, that he was made a regular in the Batman franchise. He's lucky he wasn't cancelled! We would never have spotted these amazing Easter Eggs in the latest Joker film if it hadn't been for the internet!

"Float like a butterfly and sting like a bee." "Man of Steel, beware, I'm Muhammed Ali!" At least, that's what he could have said after knocking out Superman in a boxing match. Yes, indeed! DC Comics published Superman vs. Muhammad Ali in 1978. The match, which took place in an outer space boxing ring, saw Superman defeated, but he was unconcerned because it was all part of a plan to protect Earth from aliens.

Consider the following scenario: a racist man is exposed to Agent Orange-style gas while serving in Vietnam. When he is under stress, he transforms into a black superhero dressed as a Harlem Globetrotter, and neither identity remembers the other. After Marvel's success with Black Panther and Luke Cage, DC's first idea was to create something similar. Perhaps it is a relief that DC chose Black Lightning instead.

While Bulgaria is the oldest European country by name, the Republic of San Marino, an autonomous state inside Italy's borders, is Europe's oldest independent state. It was born in the year 301 AD. As other Italian republics fought and collectively became part of Italy, San Marino was able to maintain its independence for centuries, thanks in large part to its steep geography.

Perhaps it's because of Monaco's stunning sun-drenched setting on the French Riviera. Perhaps it is due to its population of well educated doctors and medical personnel. Perhaps it is due to the popularity of the Mediterranean diet, which has been shown to be the healthiest in the world. Of any event, the average life expectancy in Monaco is 89.4 years old, making it the highest in the world, not just in Europe.

Denmark is one of the happiest nations in the world, therefore it may come as a surprise that there is no literal equivalent for the word please in Danish, according to VisitDenmark. Even though there is no word for please in Danish, you should still be polite.

Are you prone to mosquito bites? Iceland will suit you perfectly! Iceland is mosquito-free, thanks to a lack of small ponds and temperatures that are unfavourable for mosquito breeding – so you can sleep with your windows open anytime you like.

Although episodes of SuperFriends show him water-skiing with dolphins, Flash makes it clear in the comics that his ability to control sea life doesn't work as well with them as it does with simple fish. According to this Reddit user, Aquaman can't directly control dolphins because their brains are too developed; instead, he can "influence them and hope they follow his orders."

In the 1940s, everyone's favourite Amazonian was dubbed "Suprema, the Wonder Woman," but editor Sheldon Mayer later dropped the moniker because he thought it was too similar to "Superman." If that isn't shocking enough, consider this Wonder Woman fact: the Amazon Princess and Green Lantern were supposed to be a couple until a fan suggested the same pairing. To avoid legal wranglings, DC decided not to continue with the love story.

In Justice League #50, Batman discovered one of the Joker's darkest secrets. As he sat in the Mobius Chair, which can answer any question, Batman inquired, "what is the identity of the Joker?" To everyone's surprise, the answer was that the Joker had three different personalities. The most widely held belief among fans is that these three actors played the Joker during the Golden (Jack Nicholson), Silver (Caesar Romero), and Bronze (Heath Ledger) eras of comic book history.

When Joss Whedon took over production of Justice League after Zack Snyder abruptly left, he had to re-shoot portions of the film. However, for unknown reasons, Henry Cavill was not allowed to shave his moustache. It was part of his image for their Mission Impossible sequel, but was a false stubble really that difficult to create? Producers for the Justice League had to CGI Henry's face and magically remove his moustache. It's a funny time.

Today, it appears obvious that the first superhero was essentially Hercules in blue tights. However, one of the early Superman draught ideas was of a short, bald, mad scientist type who called himself "The Super Man." Perhaps this is why Lex Luthor has such a negative attitude toward super-powered individuals.

Barbara Gordon's crippling was one of the most infamous scenes in the Batman saga. When Alan Moore had the idea, he asked DC's head, Len Wein, if it was okay. Wein is said to have said, "sure, go ahead," as if they didn't care about her. Moore later said in a 2006 interview that he wished DC had reined him in a little more on that.

DC held a tele-vote in 1988, asking readers to vote on whether Jason Todd should live or die. Todd's abrasive, bratty, and headstrong demeanour made him so unpopular that fans voted "yes," sealing his fate by a razor-thin margin (5,343 – yes, to 5,271 – no). It turns out that The Joker beating him to a pulp with a crowbar and leaving him in an exploding warehouse was entirely up to the fans. Despite this shocking decision, DC continues to pay homage to the iconic character to this day. In fact, an Easter Egg in The Dark Knight featured a small nod to Robin!

Despite enjoying widespread acceptance for many years, the "dominance" notion of dog training is gradually being exposed. "You should never try to dominate your dog," Hartstein says emphatically. The concept that you need to demonstrate your dog "who's alpha" by doing things like eating before them, making sure you're constantly in a higher position than them, or using punishing behaviour is obsolete and unhelpful. Of course, you should establish a schedule and ensure that your dog understands rules and boundaries, but ignore standard advice regarding dominance shows.

A Bloodhound's sense of scent is so acute and exact that it may be used as evidence in court. Their scent membranes allow dogs to distinguish odours at least a thousand times better than humans. Bloodhounds are frequently employed to locate missing people and criminals. They can follow traces that are almost 300 hours old and can go 130 miles on a path.

Dogs have an incredible lexicon, with the potential to learn over 1,000 words! For example, Chaser, a Border Collie, understands both nouns and verbs well enough to create an action. Dog psychology schools at prominent colleges like as Duke University, Yale University, and Barnard College are actively conducting research on the subject.

In 2012, Max the Golden Retriever became the first mayor of the municipality of Idyllwild, California. Mayor Max died in 2013, however he was succeeded by Mayor Max the II, who has been in command of the town ever since. Because Idyllwild is a non-incorporated municipality with no human mayor, Idyllwild Animal Rescue Friends (ARF) financed the first-ever election for Idyllwild. Any person may nominate their pet, which resulted in 14 dogs and two cats on the vote. All votes cost one $1, with the revenues benefiting ARF. These aren't the only creatures who made it onto a ballot.

Have you ever wondered why dogs prefer to whirl around before going to the bathroom? It's one of many puzzling canine habits, but the predominant hypothesis is that it has something to do with the Earth's magnetic field. Dogs like to defecate towards north or south, and whirling around helps them position their internal compasses appropriately.