Curious about everyday life? Start here. Explore English editions of Samulgoongi’s illustrated explainers, translated from our original Korean articles.
Why Don’t We Throw Garbage into Volcanoes?
According to a report published by the World Bank, the amount of waste generated worldwide is expected to rise from 2 billion tonnes in 2016 to 3.4 billion tonnes in 2050. That…
Read article →Is Space Really Empty? Dark Matter and Dark Energy Explained
Wave your hand through empty space. It may seem as if nothing is there, but there is actually air. The empty spaces around us on Earth are filled with it. Outer space,…
Read article →How Do Barcodes Work? The Information Hidden in Stripes
Barcodes are commonly used when customers buy products. Take an item to the checkout, and the clerk scans its barcode. The product information then appears on a computer connected to the scanner,…
Read article →Why Is 0! Equal to 1? Zero Factorial Explained
The factorial of a natural number—a positive integer—is written with an exclamation mark (!). For a positive integer n, the product of all the integers from 1 through n is called n!.For…
Read article →Why Do Tanks Use Tracks Instead of Wheels?
Look at a tank and you will see several wheels surrounded by steel plates, moving much like an escalator. This type of drive system is called a continuous track. It is widely…
Read article →What Happens If a Baby’s Umbilical Cord Is Not Cut?
The umbilical cord develops at around the fifth week from the fertilized egg, incorporating remnants of the yolk sac and allantois. After implantation, fetal membranes and the lining of the mother’s uterus…
Read article →Why Do Your Hands Get Greasy Inside Disposable Gloves?
When eating fried chicken, you might use your bare hands or chopsticks, or put on disposable polyethylene gloves. But did you know your hands can still get greasy when you eat fried…
Read article →Could Identical Twins Take Exams for Each Other?
You may not often see identical twins together, but you have probably encountered a pair somewhere. Identical twins have the same sex and look alike, making them difficult to distinguish by appearance…
Read article →Why Is There a Divider Inside a Gas Lighter?
A lighter is a convenient way to make the flame needed for smoking. There are oil lighters, electric lighters and gas lighters, with gas lighters being a common choice. A typical gas…
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