How a melted candy bar changed the way we cook

What if I told you some of the most recognizable, everyday things we use, like the microwave oven or Post-it notes, and other revolutionary inventions like penicillin or Velcro, came about by accident? That’s right; they weren’t necessarily the result of careful planning, but the byproduct of other experiments that unintentionally led to their findings. Keep reading to learn about 10 fascinating discoveries that occurred by accident.

Penicillin became the first widely used antibiotic and went on to save millions of people from deadly bacterial infections. But this wasn’t what its creator, Scottish bacteriologist Alexander Fleming, was trying to do in the first place.

In 1928, he went to his laboratory and noticed that in one of his bacterial culture dishes, a mold had grown accidentally and killed the surrounding bacteria. This small accident sent him down a path to figure out what happened and eventually led him to discover what we know as penicillin.

One day, a scientist was working with a magnetron as always when he suddenly realized that the candy bar in his pocket had melted. Surprised by this, he brought popcorn kernels close to the magnetron and watched them pop; finally, he tried an egg, which heated up and burst.

The scientist was Percy Spencer, and he had just laid the foundations for creating the first commercial microwave oven, called the Radarange, which was introduced in 1947, opening the door to a whole new way of cooking.

How did a fake glue become a billion-dollar idea? Scientist Spencer Silver was trying to create a powerful glue in 1968, but instead, he ended up with an adhesive that was strong enough to stick to surfaces but incredibly easy to peel off without leaving much residue.

Instead of regarding this as a failure, he thought it might have some practical use, though his idea was dismissed multiple times by others. Finally, in 1974, another scientist called Art Fry realized Silver’s glue could hold a bookmark in place, which, after years of experimenting, led to the invention of a single piece of paper that could stick and be removed without damaging the surface: the Post-it notes.

An upset chef in Saratoga Springs, New York, in 1853, after a fussy customer complained his potatoes were too thick, served him extremely thin potatoes fried in oil as a joke. Turns out, the customer loved it, and the dish became known as "Saratoga chips."

It’s fair to mention that this popular snack wasn’t 100% invented there, as there are records of a similar recipe in an 1817 English cookbook, though the Saratoga chef certainly helped popularize it.

While Velcro was indeed created and patented by the Swiss engineer George de Mestral in 1955, the reality is that nature had invented it first. What triggered Mestral's "eureka" moment was seeing some burrs stuck to his clothing and his dog’s fur when returning from a hunting trip.

He was curious about how the burr could stick so firmly, and after studying it with a microscope, he saw that the burr had some tiny hooks that attached to the fabric and the animal fur, so he decided to replicate the same principle to create Velcro.

In 1938, a chemist and DuPont worker called Roy Plunkett was working with tetrafluoroethylene gas, trying to come up with new refrigerants, though he ended up creating a completely new material. At some point while doing his experiments, he noticed the gas had turned into a waxy solid "thing" that was extremely resistant to heat and chemicals and was highly nonstick.

The material was first used in industrial and military applications and later became associated with the brand name Teflon, mainly used as a coating for cookware.

Scientists first rejected Super Glue because it was too sticky — ironic, isn’t it? The story makes more sense when you learn that the initial goal of Harry Coover Jr. and his team in 1942 was to find a material to make clear plastic gun sights during World War II.

The material they were experimenting with was too sticky and difficult to work with, so the team moved away from it, though Coover Jr. realized he had discovered a substance that could easily bond two surfaces together without the need to use heat or pressure. Later, this product went on to become what we all know now as Super Glue.

Kids love popsicles, but did you know it was also a kid who invented them? In 1905, Frank Epperson, an 11-year-old boy from San Francisco, forgot his soda with a wooden stirring stick outside overnight on his porch. The next morning, the thing was frozen, and he noticed he could hold it by the stick and eat it like a frozen treat.

At first he made them for his family and friends, but later he started selling his invention. The popsicle became a sensation, particularly during the Great Depression, as it was an affordable treat for the family.

Imagine being a serious naval engineer working on a serious engineering problem and accidentally creating one of the most fun and iconic toys ever. That’s exactly what happened to Richard James, who in 1943 was trying to make springs to help stabilize sensitive equipment aboard ships when one of them accidentally fell and "walked" away.

James saw the opportunity to make a toy out of that and showed it to his wife, who named it "Slinky." The naval engineer sold the toy to Gimbels department store in Philadelphia in 1945, and Slinky was an immediate success.

The whole point of laminated safety glass is that its pieces won’t fly apart when it breaks. The discovery was made by chemist Édouard Bénédictus in the 1900s, when one of his laboratory flasks fell and did not completely shatter because it had a thick coating of a type of plastic that helped hold the pieces together.

This accident made him realize that putting a flexible material between layers of glass prevents broken glass from flying apart. His discovery is still used today in vehicles and buildings.

Translation and interpretation

Was the forbidden fruit really an apple? 10 Bible surprises

What if some of the Bible stories you grew up with aren't exactly what the Bible says? Was the forbidden fruit really an apple? Were there actually three Wise Men? Did "God helps those who help themselves" really come from the Bible? Over centuries, translations, traditions, and famous works of art have added details that became so familiar, we stopped questioning them. But go back to the texts, and some of these stories look surprisingly different. From Eve's "apple" to the date of Jesus' birth, here are 10 familiar parts of the Bible that may not be quite what we remember.

When you picture the Garden of Eden, what fruit comes to mind? Most people imagine an apple, but there's just one problem: the Bible never says it was an apple.

In the Book of Genesis, the fruit is simply called "the fruit of the tree of the knowledge of good and evil." The original Hebrew text uses the word peri, which simply means "fruit." The apple connection came centuries later, largely through the Latin translation. The Latin word malum can mean both "apple" and "evil," making it an especially fitting symbol for the story. Over time, that association spread through Christian art and literature. Famous works such as Albrecht Dürer’s 1504 engraving Adam and Eve (also known as The Fall of Man) helped cement the image of Eve holding an apple. Today, it's one of the most famous scenes in history, even though the original biblical text doesn’t identify the fruit as an apple at all.

The story of Jesus' birth is so famous that most of us picture the Three Wise Men, sometimes called the Three Kings, standing beside the manger. But the thing is, over the centuries, the story picked up a few details that aren't actually in the Bible.

In the Gospel of Matthew, the only Gospel that mentions these visitors, they are described simply as Magi from the East. The original Greek word, magoi, referred to learned scholars, astrologers, or priests from Persia or Babylon, not kings. But where did the number three come from? Matthew lists three gifts: gold, frankincense, and myrrh, but never says how many visitors brought them. Over the centuries, people naturally assumed there must have been three Magi, one for each gift. Even their familiar names, Melchior, Caspar, and Balthasar, were added later by Christian tradition. So, neither the number of visitors nor their names appears anywhere in the biblical text.

Whether it's used to motivate a friend, encourage a family member, or push yourself to finally make a difficult decision, "God helps those who help themselves" is one of the most familiar religious sayings in America. But here's the surprise: those words never appear in the Bible.

The idea can be traced to ancient Greek sources, including Aesop’s Fables, where the saying appears in an earlier form: "The gods help them that help themselves." The exact modern wording was written by English politician Algernon Sidney in 1698, but it was Benjamin Franklin who helped make it part of American culture when he included it in his 1736 edition of Poor Richard’s Almanack.

Many teenagers have heard "Cleanliness is next to godliness" when it was time to clean their rooms. But despite sounding like a Bible verse, the phrase never appears in Scripture.

The Bible, particularly Leviticus, does contain extensive laws requiring people to wash their bodies and clothes in certain circumstances, especially before religious rituals. But the famous saying itself came much later. In 1605, Francis Bacon wrote in The Advancement of Learning that "cleanness of body" was connected to reverence for God. Then, in 1786, it was Methodist leader John Wesley who used the wording we recognize today in a sermon: "Cleanliness is indeed next to Godliness." Over time, the phrase became a familiar saying that many people simply assumed came from the Bible.

When it comes to famous dates, December 25 may be the most recognizable of all, universally associated with Christmas. But here's the surprising part: the Bible never gives any specific date for Jesus' birth.

The Gospels of Matthew and Luke describe the Nativity but never provide a calendar date, so how did December 25 become Christmas? There are two leading theories. The first is that the Roman Church was celebrating Christmas on December 25 by 336 AD, during Constantine's reign, possibly choosing the date to coincide with existing Roman winter festivals and make it easier to convert the empire to Christianity. The second points to an early Christian tradition that calculated Jesus' birth date from the supposed date of his crucifixion, eventually arriving at December 25.

The story of Jonah and the Whale is so famous that it has appeared literally or symbolically in innumerable works of art and literature, from Michelangelo's Sistine Chapel ceiling (1508-1512) to Herman Melville's 1851 novel Moby-Dick. But there's a small problem with the title we've given it: the Bible doesn’t actually say it was a whale.

In the Old Testament, the original Hebrew text of Jonah 1:17 uses the words dag gadol, meaning "great fish" or "large fish"; it doesn't identify the creature as a whale, or even specify what kind of fish it was. Most modern English translations therefore stick with "great fish," but the familiar "whale" interpretation developed through older translations and later European tradition, eventually becoming so widespread that "Jonah and the Whale" became the name almost everyone recognizes.

Just as we've always pictured the forbidden fruit as an apple, many of us also assume the serpent in the Garden of Eden is the devil himself. But the original story is a little more complicated.

A plain reading of Genesis depicts the creature simply as a serpent or snake, using the Hebrew word nachash. It describes the serpent as clever and crafty, but it never calls it Satan or explicitly identifies it as the devil. So where did the connection come from? The answer comes from later parts of the Bible, particularly the New Testament. In Revelation 12:9 and 20:2, Satan is called "the ancient serpent" (ho ophis ho archaios in Greek), connecting him to the snake of Eden. Over time, Christian tradition applied that later connection back to Genesis, leading to the familiar belief that the serpent was Satan himself.

Many of us remember Samson for his legendary strength and the long hair that was said to be the source of his power. His story with Delilah is one of the Bible's most famous tales of betrayal, but there's one detail some people may have gotten wrong: Delilah didn't actually cut his long hair.

In Judges 16:19, Delilah has Samson's hair shaved while he sleeps on her lap. The text says she called for a man to do the shaving; it never says she did it herself. Yet paintings, films, and other retellings have often shown Delilah wielding the scissors herself, cementing that image in popular culture. It can be considered a small detail, but it’s a great example of how easily familiar Bible stories can pick up elements that aren't actually in the original text.

Many of us think of the Bible as a single book, written at one particular time by one author, or perhaps a handful of them. After all, that's how it looks when you pick one up in a hotel room, but its history is far more complicated.

The Bible is actually a collection of books written by over 40 authors over roughly 1,500 years, from about 1400 BC to AD 100. The exact number of books varies by religious tradition: Protestant Bibles contain 66 books, while Catholic and Orthodox traditions include additional books. Across these different traditions, the writings were produced by kings, prophets, fishermen, and scholars in Hebrew, Aramaic, and Greek. They also span a tremendous range of literary styles, including history, poetry, songs, laws, letters, and prophecy. So while we hold it as one book today, the Bible is actually a collection of many different writings produced across centuries.

Many people assume that at least a few original fragments of the Bible must still exist somewhere. It would be incredible if they did, but none of the original manuscripts, known as autographs, have survived.

The earliest biblical texts were written on fragile materials such as papyrus and animal skins, which could deteriorate through humidity, heat, handling, and simple age. Wars, fires, and other destruction also contributed to their disappearance. So how do we know what the originals said? Through a technique called textual criticism: expert scholars compare thousands of handwritten copies, ancient translations, and quotations from early Christian writers. When they find passages that match across different sources, or differences that reveal how a text changed over time, they can work backward to determine what the original most likely said, even though the original manuscripts themselves are gone.