Batman is defined by his all-encompassing knowledge of everyone's secrets, whether they be friend or foe. But this time, we're the ones who did some digging on the Dark Knight, and we rounded up some lesser known facts about him, from his lost "first movie" to some crazy feats in the comics. Check out our list of 17 things you (probably) didn't know about the Caped Crusader.

1. Bruce Wayne's Name Comes from Two Real Heroes

2. Batman’s Screen Name

3. The Batcave Debuted on TV

4. Batman Beat Darkseid… Twice!

5. There’s a Batman College Course

6. Batman Could Have Been a Yellow Lantern

7. Batman Used to Kill People

Batman’s secret identity, Bruce Wayne, was derived from two historical figures.Robert the Bruce, a Scottish national hero:And Mad Anthony Wayne, a hero of the American Revolution:Batman’s online screen name is JonDoe297.A 1943 TV serial called The Batman introduced the concept of the Batcave, not to mention a skinny Alfred Pennyworth.Darkseid is essentially the end boss of the DC Universe, an evil god who can go toe-to-toe with Superman himself. Even though Batman is a mere mortal, he's bested the villain on two separate occasions.The first time, Darkseid blasted him with his Omega Sanction beams, so Batman shot Darkseid with a god-killing gun. Darkseid's beams sent Batman back in time, but Batman eventually returned to the present and thwarted Darkseid's plans.The second time, Batman put on the Hellbat armor designed by the Justice League, giving him immense strength at the expense of his own life-force. He was able to brawl with Darkseid long enough to complete his mission, rescuing his son Damian Wayne.There’s a real course called The Science of Batman at the University of Victoria in Canada. The course description reads: “The extreme range of adaptability of the human body explored through the life of the Caped Crusader.”The Yellow Lanterns of the Sinestro Corps are powered by fear, so when a ring attempted to choose the best person on Earth when it comes to instilling fear, it chose Batman. Yup, criminals are that scared of Batman.Though his no-killing stance is widely known today, Batman was originally a gun-toting vigilante who would not only shoot his enemies but throw them in vats of acid...break their necks with karate kicks......and hang them from Batplane.