Let's take on a four-choice quiz that everyone can enjoy together!

1 bird

There are thought to be various origins, and according to one theory, when the fifth shogun Tokugawa Tsunayoshi issued the Edicts on Compassion for Living Things in the early Edo period, people treated rabbits as birds and ate them.

Handshake

In Mongolia, bumping into someone’s foot is considered an expression of hostility, so there is a custom of shaking hands when you step on someone’s foot to show you mean no harm.

black

Their skin is black to efficiently absorb the sun’s heat, and their body hair is translucent in color.

sturgeon

It’s surprising to learn that despite having “shark” in its name, it isn’t actually a shark, isn’t it? Many people probably think sturgeon are sharks. But in fact, the sturgeon is a type of ancient fish. Like sharks, they don’t have teeth, and they have a gentle temperament—they don’t attack people.

8 pieces

Because of how they look, people often assume octopuses have eight legs and squids have ten, but in fact squids also have eight legs. The two that make them appear to have ten are called tentacular arms, used for catching prey, and are counted as arms rather than legs. If you look closely, you’ll notice they differ in shape and length from the other eight, so be sure to observe them carefully.

20 hours

Eucalyptus, the main food of koalas, is fibrous, highly toxic, and low in nutrients, so it requires a lot of energy to digest. For that reason, they are said to sleep about 20 hours a day to conserve energy. On the other hand, it’s said that when they really run, they can reach around 30 km/h, which really shows how fascinating animals can be.

Stress

It's surprising to think that plants feel stress, isn't it? What's more, it seems that when plants are stressed, they emit ultrasounds. Humans can't hear them, but they're said to be like screams. Plants can feel stress due to various factors such as cutting, drying, and nutrient deficiency.