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Serial Killer vs. Mass Murderer: What's the Difference?

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gacy-clown-300.jpgThe Dilemma: The guy sitting next to you at the bar keeps insisting that John Wayne Gacy wasn't a serial killer but a mass murderer, which is really creepy. But is he right?


People You Can Impress: Authors of true crime novels and suckers for semantics.


The Quick Trick: The creepy guy at the bar is full of it: Gacy was a serial killer because he committed many murders over a long period of time; mass murderers commit many murders all at once.

The Explanation:
The difference here is all about the details—but then, any CSI fan knows that the magic of police work is in the little things. According to the U.S. Department of Justice, Statistics Bureau (and yes, there really is such a thing), "mass murder" is a single event at one location involving the murder of four or more people. Kill three people at once, therefore, and you're merely a homicidal jerk. Terrorism and government-sanctioned murder often are considered mass murder.

Serial killers, on the other hand, kill in a series of events. The killers usually don't know their victims (the opposite is true with mass murderers), they almost always have "cooling off " periods between murders, and they usually derive sexual excitement from the killings. To qualify as a serial killer, one needs three victims. It rather goes without saying, but serial killers tend to be pretty screwed up individuals. Although there are records of serial killers going back to at least 1400, the term wasn't coined until the 1970s, when killers Ted Bundy and David "Son of Sam" Berkowitz were frequently in the news.

Serial Killers

GILLES DE RAIS (1404"“1440): Once one of the richest men in France, Rais raped, tortured, and murdered between 80 and 200 boys—and a few girls—on the grounds of his various estates.

Long before there was Aileen "Monster" Wuornos, there was ELIZABETH "THE BLOODY LADY" Bathory (1560"“1614). Some sources claim that Bathory, a Hungarian countess, tortured and killed 2,000 young girls (mostly peasants, but some lower gentry).

When it comes to British serial killers in the 19th century, Jack the Ripper gets all the press. But MARY ANN COTTON (1832"“1873) was more prolific, killing as many as 21 people. Cotton probably poisoned four of her husbands, a variety of her friends and in-laws, and several of her own children with arsenic.

Mass Murderers

The term "going postal" has its roots in the case of one PATRICK SHERRILL, a disgruntled former postman who walked into the post office in Edmond, Ill. on August 20, 1986, and killed 14 employees before committing suicide.

On November 1, 1955, JACK GILBERT GRAHAM put his mother on a flight from Denver to Portland with a dynamite bomb in her suitcase. (Graham wanted her life insurance money.) The bomb exploded midair, killing all 44 people aboard.

This post was excerpted from the mental_floss book What's the Difference? For more columns like this, click here.

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Pop Culture
The Sweet Surprise Reunion Mr. Rogers Never Saw Coming
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Family Communications Inc./Getty Images

For more than 30 years, legendary children’s show host Fred Rogers used his PBS series Mister Rogers’ Neighborhood to educate his young viewers on concepts like empathy, sharing, and grief. As a result, he won just about every television award he was eligible for, some of them many times over.

Rogers was gracious in accepting each, but according to those who were close to the host, one honor in particular stood out. It was March 11, 1999, and Rogers was being inducted into the Television Academy Hall of Fame, an offshoot of the Emmy Awards. Just before being called to the stage, out came a surprise.

The man responsible for the elation on Rogers’s face was Jeff Erlanger, a 29-year-old from Madison, Wisconsin who became a quadriplegic at a young age after undergoing spinal surgery to remove a tumor. Rogers was surprised because Erlanger had appeared on his show nearly 20 years prior in 1980 to help kids understand how people with physical challenges adapt to life’s challenges. Here's his first encounter with the host:

Reunited on stage after two decades, Erlanger referred to the song, “It’s You I Like,” which the two sang during their initial meeting. “On behalf of millions of children and grown-ups,” Erlanger said, “it’s you I like.” The audience, including a visibly moved Candice Bergen, rose to their feet to give both men a standing ovation.

Following Erlanger’s death in 2007, Hedda Sharapan, an employee with Rogers’s production company, called their poignant scene “authentic” and “unscripted,” and that Rogers often pointed to it as his favorite moment from the series.

Near the end of the original segment in 1980, as Erlanger drives his wheelchair off-camera, Rogers waves goodbye and offers a departing message: “I hope you’ll come back to visit again.”

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entertainment
20 Things You Might Not Have Known About Firefly
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© 2002 Twentieth Century Fox

As any diehard fan will be quick to tell you, Firefly's run was far, far too short. Despite its truncated run, the show still offers a wealth of fun facts and hidden Easter eggs. On the 15th anniversary of the series' premiere, we're looking back at the sci-fi series that kickstarted a Browncoat revolution.

1. A CIVIL WAR NOVEL INSPIRED THE FIREFLY UNIVERSE.

The Pulitzer Prize-winning novel The Killer Angels from author Michael Shaara was Joss Whedon’s inspiration for creating Firefly. It follows Union and Confederate soldiers during four days at the Battle of Gettysburg during the American Civil War. Whedon modeled the series and world on the Reconstruction Era, but set in the future.

2. ORIGINALLY, THE SERENITY CREW INCLUDED JUST FIVE MEMBERS.

When Whedon first developed Firefly, he wanted Serenity to only have five crew members. However, throughout development and casting, Whedon increased the cast from five to nine.

3. REBECCA GAYHEART WAS ORIGINALLY CAST TO PLAY INARA.

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Before Morena Baccarin was cast as Inara Serra, Rebecca Gayheart landed the role—but she was fired after one day of shooting because she lacked chemistry with the rest of the cast. Baccarin was cast two days later and started shooting that day.

4. NEIL PATRICK HARRIS WAS ALMOST DR. SIMON TAM.

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Before it went to Sean Maher, Neil Patrick Harris auditioned for the role of Dr. Simon Tam.

5. JOSS WHEDON WROTE THE THEME SONG.

Whedon wrote the lyrics and music for Firefly’s opening theme song, “The Ballad of Serenity.”

6. STAR WARS SPACECRAFT APPEAR IN FIREFLY.

Star Wars was a big influence on Whedon. Captain Malcolm Reynolds somewhat resembles Han Solo, while Whedon used the Millennium Falcon as inspiration to create Serenity. In fact, you can spot a few spacecraft from George Lucas's magnum opus on the show.

When Inara’s shuttle docks with Serenity in the pilot episode, an Imperial Shuttle can be found flying in the background. In the episode “Shindig,” you can see a Starlight Intruder as the crew lands on the planet Persephone.

7. HAN SOLO FROZEN IN CARBONITE POPS UP THROUGHOUT FIREFLY.

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Nathan Fillion is a big Han Solo fan, so the Firefly prop department made a 12-inch replica of Han Solo encased in Carbonite for the Canadian-born actor. You can see the prop in the background in a number of scenes.

8. ALIEN'S WEYLAND-YUTANI CORPORATION MADE AN APPEARANCE.

In Firefly’s pilot episode, the opening scene features the legendary Battle of Serenity Valley between the Browncoats and The Union of Allied Planets. Captain Malcolm Reynolds takes control of a cannon with a Weyland-Yutani logo inside of its display. Weyland-Yutani is the large conglomerate corporation in the Alien film franchise. (Whedon wrote Alien: Resurrection in 1997.)

9. ZAC EFRON'S ACTING DEBUT WAS ON FIREFLY.

A 13-year-old Zac Efron made his acting debut in the episode “Safe” in 2002. He played Young Simon in a flashback.

10. CAPTAIN MALCOLM REYNOLDS'S HORSE IS A WESTERN TROPE.

At its core, Firefly is a sci-fi western—and Malcolm Reynolds rides the same horse on every planet (it's named Fred).

11. FOX AIRED FIREFLY'S EPISODES OUT OF ORDER.

Fox didn’t feel Firefly’s two-hour pilot episode was strong enough to air as its first episode. Instead, “The Train Job” was broadcast first because it featured more action and excitement. The network continued to cherry-pick episodes based on broad appeal rather than story consistency, and eventually aired the pilot as the show’s final episode.

12. THE ALLIANCE'S ORIGINS ARE AMERICAN AND CHINESE.

The full name of The Alliance is The Anglo-Sino Alliance. Whedon envisioned The Alliance as a merger of American and Chinese government and corporate superpowers. The Union of Allied Planets’ flag is a blending of the American and Chinese national flags.

13. THE SERENITY LOUNGE SERVED AS AN ACTUAL LOUNGE.

Between set-ups and shots, the cast would hang out in the lounge on the Serenity set rather than trailers or green rooms.

14. INARA SERRA'S NAME IS MESOPOTAMIAN.

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Inara Serra is named after the Mesopotamian Hittite goddess, the protector of all wild animals.

15. THE CHARACTERS SWORE (JUST NOT IN ENGLISH).

The Firefly universe is a mixture of American and Chinese culture, which made it easy for writers to get around censors by having characters swear in Chinese.

16. THE UNIFORMS ARE RECYCLED FROM STARSHIP TROOPERS.

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The uniforms for Alliance officers and soldiers were the costumes from the 1997 science fiction film Starship Troopers. The same costumes were repurposed again for the Starship Troopers sequel.

17. "SUMMER!" MEANS SOMEONE MESSED UP.

Every time a cast member flubbed one of his or her lines, they would yell Summer Glau’s name. This was a running gag among the cast after Glau forgot her lines in the episode “Objects In Space.”

18. THE SERENITY SPACESHIP WAS BUILT TO SCALE.

The interior of Serenity was built entirely to scale; rooms and sections were completely contiguous. The ship’s interior was split into two stages, one for the upper deck and one for the lower. Whedon showed off the Firefly set in one long take to open the Serenity movie.

19. "THE MESSAGE" SHOULD HAVE BEEN THE SHOW'S FAREWELL.

Although “The Message” was the twelfth episode, it was the last episode filmed during Firefly’s short run. Composer Greg Edmonson wrote a piece of music for a funeral scene in the episode, which served as a final farewell to the show. Sadly, it was one of three episodes (the other two were “Trash” and “Heart of Gold”) that didn’t air during Firefly’s original broadcast run on Fox.

20. FIREFLY AND SERENITY WERE SENT TO THE INTERNATIONAL SPACE STATION.

American Astronaut Steven Ray Swanson is a big fan of Firefly, so when he was sent to the International Space Station for his first mission (STS-117) in 2007, he brought DVD copies of Firefly and its feature film Serenity aboard with him. The DVDs are now a permanent part of the space station’s library.

This post originally appeared in 2014.

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