No one can deny that these individuals left their mark on history. Welcome to WatchMojo, and today we’re counting down our picks for the most popular, important, and/or notable figures in history regardless of reputation.

These crazy theories will either have you shaking your head or begging it to stop spinning. Welcome to WatchMojo, and today we’re looking at strange and interesting premises about the nature of history and the universe that don’t jibe with any standard conception of accepted reality.

From classical to rock and everything in between, the music world shifted on its axis when these moments happened. Welcome to WatchMojo, and today we’re looking at landmark music moments that made history.

These US leaders altered the course of history in major ways. Welcome to WatchMojo, and today we’re counting down the American presidents who, for better or for worse, changed history the most.

These moments from history changed everything! Welcome to WatchMojo, and today we’re counting down our picks for key discoveries, eras, technological achievements, and watershed moments that reshaped civilizations.

These famous individuals continue to baffle historians. Welcome to WatchMojo, and today we’re counting down the most mysterious and secretive people throughout history, not including religious figures.

At nearly 70 years old, television has come a long way! Welcome to WatchMojo, and today we’re counting down our picks for the the most influential and groundbreaking television programs throughout history.

These are history's most twisted minds. Welcome to WatchMojo, and today we’re having a look at the most notorious psychopaths in history.

Thank your lucky stars you didn't have to endure any of these horrific sieges. Welcome to WatchMojo, and today we’re counting down our picks for the most famous sieges of all time, widely remembered for the ferocity of the defenders, the brutality of the attackers, or the battle’s place in history.

These bring back some sad memories... Welcome to WatchMojo, and today we’re examining the most infamous and shocking behind-the-scenes stories in TV history.

These female spies were the best in the biz. For this list, we’ll be looking at some of the most cunning and courageous women in espionage throughout history.

These assassinations changed the trajectory of world history. For this list, we’ll be looking at notorious slayings of public figures throughout history that left a mark in the history books.

These historical docs should be on everyone's list. For this list, we’ll be looking at non-fiction feature films that most powerfully express or preserve an important event in history.

He became Death, Destroyer of Worlds. For this video, we're looking at the true story behind the nuclear bombs created by J. Robert Oppenheimer as part of the Manhattan Project. It's a history that demonstrates the capacity of science for both human betterman and destruction - nuclear energy on one hand and nuclear weapons on the other. What side of Barbenheimer do you fall on? Do you plan to see "Oppenheimer"? Have you already seen it? What did you think? Tell us in the comments.

These ambushes altered the course of human history. For this list, we’re examining sneak attacks that made a significant impact on world events, either in the moment or over time.