An interesting question: What are insects?

There are really many insects in this world! Do you know that they have more species than mammals, birds, reptiles, Amphibian and fish combined! More than one million species of insects account for half of the entire biological world. Well, they are big stars in the biological world!

Why can insects be so successful? This is thanks to their superpowers! Firstly, we need to mention the flying skills of insects. That's right, most insects come and go, they freely soar in the air, and their range of activity is not limited to the ground! They are naturally capable of flying, and they are really free!
Not only that, insects also have a very special ability, which is metamorphosis! Yes, you heard me right. Insects are masters of transformation. From egg to larva, then to pupa, and finally to a completely different form of adult, this process is amazing! This abnormal ability allows insects to adapt to the environment and avoid competition at different stages, which is a very powerful adaptation strategy!
Also, did you know that insects can still sleep! Well, when the environment becomes harsh, they will enter a dormant state and wait for the environment to improve before waking up again. In this way, they can avoid extinction, they are incredibly smart!
However, to be honest, although insects have so many powerful superpowers, we humans still occupy a dominant position on Earth! After all, we have stronger brain computing power. However, if insects also have the same intelligence as us, perhaps we should be careful to be surpassed by them!

So why don't insects develop into the ocean? There is no definite answer to this question yet, but there are two interesting speculations. One guess is that there are already many Arthropod in the sea, such as crabs and shrimps. Their positions in the ecosystem and food chain are similar to those of insects. Insects may not find their own Lebensraum in the sea. Another speculation is that insects cannot form their own shells in the ocean, as the shells in the ocean are composed of calcium carbonate, while the shells of insects are mainly composed of chitin. The different amounts of these two substances present in seawater may limit their survival in the ocean.

There is also a mystery about insects, which is why they are always attracted to light, like moths to a fire. The latest research has found that insects are not attracted by light, but by ultraviolet radiation. They can see ultraviolet light, thinking that the light source is the sun or moon, so they pounce in that direction. This behavior stems from the ability of insects to use light to determine up and down directions.

Finally, why are insects so small? There are two interesting hypotheses that can explain this problem. First, insects have no Endoskeleton, and their bones are all outside, which limits their growth rate. Secondly, insects do not have lungs. They breathe through the trachea and transport oxygen to various parts of the body through the trachea. This breathing method limits the size of insects because they cannot support too much weight.