If we peel an apple and leave it, it will turn brown.This is because the polyphenol contained in apples combines with oxygen in the air to form a brown pigment.Apples contain polyphenols and substances called enzymes that oxidize them.Init…

When you take off your sweater, you will hear a crackling sound because there is a small thunder.The crackling sound of the sweater and the thunder are the work of static electricity that can be created by rubbing objects.What exactly is s…

There are many things in our body, one on each side.Hands, feet, eyes, etc. In fact, the brain inside the head also has a right brain and a left brain.The brain is an important part that gives various commands to the whole body to move and…

The Nobel Prize is given every year to those who have worked hard for peace and those who have made great achievements in science and literature etc. Nobel made this award.Nobel's father was making land mines.A land mine is a bomb that exp…

When salmon grow up, they go out to sea, but at the time to lay their eggs, they return to the river where they were born. It is believed that salmon remember the smell of the river in which they were born and rely on that memory to find i…

If you go up the river from the sea to see the beginning of the river, the width of the river narrows, and finally you reach a place where spring water spouts from the ground. That place is called the headwaters, the headwaters can be a sw…

According to modern science, the universe is thought to have been created 13.7 billion years ago.Until the beginning of the 20th century, the universe was thought to have no beginning or end. But things changed when American astronomers di…

When you suddenly enter a cold place or hit a cold wind, will your arms get lumpy? That's goosebumps. Originally, goosebumps is a mechanism that warms the body so that heat does not escape from the body when it is cold. The muscles at the …

When we drive, car navigation know where we are. If we set our destination, it guides us and tells us estimated arrival time. Why can it do that? it can see where we are now by continuing to receive electrical signals from artificial satel…

We usually use chicken's eggs for cooking. Eggs have various structure to make chick's body and protect chick's life until hatching. If you look closely at the yolk, you will see a white spot called an embryo. embryo is the important part …

When we buy beverages at a vending machine, we never say "I will insert 100JPY(Japanese Yen) coin". How do vending machines distinguish the kind of bills and coins ? Actually, inside vending machines there are machineries that can distingu…

For example, What is the hamberger made of ? We can answer that is made of bread and hamberg and vegetable. Then, What is the hamberg made of ? That's made of meat, onion, egg, salt, pepper... We can state more details. When we think about…

What's the difference between creatures born from an egg and others? That depends on the history of evolution that each creatures trailed. Evolution means that the structure of body changes along the change of environment. The first creatu…