How Did the Duck Hunt Gun Work?

For many children of the '80s, a good portion of your childhood probably revolved around sitting too close to the TV, clutching a plastic safety cone-colored hand gun and blasting waterfowl out of a pixilated sky in Duck Hunt (also, trying to blow that dog’s head off when he laughed at you). The Duck Hunt gun, officially called the Nintendo Entertainment System (NES) Zapper, seems downright primitive next to the Nintendo’s Wii and Microsoft’s Kinect, but in the late 80s, it filled plenty of young heads with wonder. How did that thing work?

Annie get your Zapper

The Zapper’s ancestry goes back to the mid 1930s, when the first so-called “light guns” appeared after the development of light-sensing vacuum tubes. In the first light gun game, Ray-O-Lite (developed in 1936 by Seeburg, a company that made parts and systems for jukeboxes), players shot at small moving targets mounted with light sensors using a gun that emitted a beam of light. When the beam struck a sensor, the targets – ducks, coincidentally – registered the “hit” and a point was scored.

Light guns hit home video game consoles with Shooting Gallery on the Magnavox Odyssey in 1972. Because the included shotgun-style light gun was only usable on a Magnavox television, the game flopped. The Nintendo Entertainment System (NES) Zapper then fell into the hands of American kids in October 1985, when it was released in a bundle with the NES, a controller and a few games. Early versions of the peripheral were dark gray, but the color of the sci-fi ray gun-inspired Zapper was changed a few years later when a federal regulation required that toy and imitation firearms be “blaze orange” (color #12199, to be exact) so they wouldn’t be mistaken for the real deal.

While there were a number of Zapper-compatible games released for the NES (when I was a kid and my dad worked from home, we wasted plenty of afternoons away playing Hogan’s Alley), most lived in the shadow of the iconic Duck Hunt, the most recognizable and popular Zapper game.

Gone in a Flash

While older light guns like the Ray-O-Lite rifle emitted beams of light, the Zapper and many other recent light guns work by receiving light through a photodiode on or in the barrel and using that light to figure out where on the TV screen you're aiming.

When you point at a duck and pull the trigger, the computer in the NES blacks out the screen and the Zapper diode begins reception. Then, the computer flashes a solid white block around the targets you’re supposed to be shooting at. The photodiode in the Zapper detects the change in light intensity and tells the computer that it’s pointed at a lit target block — in others words, you should get a point because you hit a target. In the event of multiple targets, a white block is drawn around each potential target one at a time. The diode’s reception of light combined with the sequence of the drawing of the targets lets the computer know that you hit a target and which one it was. Of course, when you’re playing the game, you don’t notice the blackout and the targets flashing because it all happens in a fraction of a second.

This target flashing method helped Nintendo overcome a weakness of older light gun games: cheaters racking up high scores by pointing the gun at a steady light source, like a lamp, and hitting the first target right out of the gate.

If you’re hungry for a more technical depth, check out Nintendo's 1989 patent on the Zapper technology

What's the Difference Between a College and a University?

Chinnapong/iStock via Getty Images
Chinnapong/iStock via Getty Images

Going off to college is a milestone in any young adult’s life. The phrase itself conjures up images of newfound independence, exposure to new perspectives, knowledge, and possibly even one or more sips of alcohol.

In America, however, few people use the phrase “going off to university,” or “headed to university,” even if they are indeed about to set off for, say, Harvard University. Why did college become the predominant term for postsecondary education? And is there any difference between the two institutions?

While university appears to be the older of the two terms, dating as far back as the 13th century, schools and students in North America have embraced college to describe most places of higher learning. There is no rigid definition of the words, but there are some general attributes for each. A college is typically a four-year school that offers undergraduate degrees like an associate or a bachelor’s. (Community colleges are often two-year schools.) They don’t typically offer master’s or doctorates, and the size of their student body is typically the smaller of the two.

Universities, on the other hand, tend to offer both undergraduate and graduate programs leading to advanced degrees for a larger group of students. They can also be comprised of several schools—referred to as colleges—under their umbrella. A university could offer both a school of arts and sciences and a school of business. The University of Michigan has a College of Engineering, for example.

While many of these traits are common, they’re not guaranteed. Some colleges can be bigger than universities, some might offer master’s degrees, and so on. To complicate matters further, an institution that fits the criteria of a university might choose to call itself a college. Both Dartmouth College and Boston College qualify as universities but use the college label owing to tradition. Schools may begin as colleges, grow into universities, but retain the original name.

People tend to think of a university as being more prestigious or harder to get into, but there are too many variables to make that determination at a glance. Some colleges might ask more of applicants than universities. Some universities might be smaller than certain colleges. Either one can be public or private.

Things get a little more convoluted abroad. In the UK, students go off to university (or uni) instead of college. The British version of college is typically a two-year program where students either focus on learning one particular skill set (much like a vocational school) or use the time to prepare for exams so that they can advance to university. Language matters, too; in Spanish, colegio usually refers to high school.

While the terms aren’t strictly interchangeable, there is enough of a difference between the two to try and make the distinction. Keep in mind that some states, like New Jersey, have rules about how institutions label themselves. There, a university has to have at least three fields of graduate study leading to advanced degrees.

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at bigquestions@mentalfloss.com.

Why Do We Eat Candy on Halloween?

Jupiterimages/iStock via Getty Images
Jupiterimages/iStock via Getty Images

On October 31, hordes of children armed with Jack-o'-lantern-shaped buckets and pillow cases will take to the streets in search of sugar. Trick-or-treating for candy is synonymous with Halloween, but the tradition had to go through a centuries-long evolution to arrive at the place it is today. So how did the holiday become an opportunity for kids to get free sweets? You can blame pagans, Catholics, and candy companies.

Historians agree that a Celtic autumn festival called Samhain was the precursor to modern Halloween. Samhain was a time to celebrate the last harvest of the year and the approach of the winter season. It was also a festival for honoring the dead. One way Celtics may have appeased the spirits they believed still walked the Earth was by leaving treats on their doorsteps.

When Catholics infiltrated Ireland in the 1st century CE, they rebranded many pagan holidays to fit their religion. November 1 became the “feasts of All Saints and All Souls," and the day before it was dubbed "All-Hallows'-Eve." The new holidays looked a lot different from the original Celtic festival, but many traditions stuck around, including the practice of honoring the dead with food. The food of choice for Christians became "soul cakes," small pastries usually baked with expensive ingredients and spices like currants and saffron.

Instead of leaving them outside for passing ghosts, soul cakes were distributed to beggars who went door-to-door promising to pray for souls of the deceased in exchange for something to eat. Sometimes they wore costumes to honor the saints—something pagans originally did to avoid being harassed by evil spirits. The ritual, known as souling, is believed to have planted the seeds for modern-day trick-or-treating.

Souling didn't survive the holiday's migration from Europe to the United States. In America, the first Halloween celebrations were a way to mark the end-of-year harvest season, and the food that was served mainly consisted of homemade seasonal treats like caramel apples and mixed nuts. There were no soul cakes—or candies, for that matter—to be found.

It wasn't until the 1950s that trick-or-treating gained popularity in the U.S. Following the Great Depression and World War II, the suburbs were booming, and people were looking for excuses to have fun and get to know their neighbors. The old practice of souling was resurrected and made into an excuse for kids to dress up in costumes and roam their neighborhoods. Common trick-or-treat offerings included nuts, coins, and homemade baked goods ("treats" that most kids would turn their noses up at today).

That changed when the candy companies got their hands on the holiday. They had already convinced consumers that they needed candy on Christmas and Easter, and they were looking for an equally lucrative opportunity to market candy in the fall. The new practice of trick-or-treating was almost too good to be true. Manufacturers downsized candies into smaller, bite-sized packages and began marketing them as treats for Halloween. Adults were grateful to have a convenient alternative to baking, kids loved the sweet treats, and the candy companies made billions.

Today, it's hard to imagine Halloween without Skittles, chocolate bars, and the perennial candy corn debates. But when you're digging through a bag or bowl of Halloween candy this October, remember that you could have been having eating soul cakes instead.

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at bigquestions@mentalfloss.com.

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