Variation vitamin intake of vitamin is required for one of the various nutrients the human body, is a necessity. In order to ensure that the…
Strawberry is a fruit that many people in our daily life love to eat. It has rich nutritional value, beautiful appearance, juicy flesh and rich…
People tend to be more impressed by the first place. For example, the first element in the earth’s crust is oxygen. Is it second only…
Mammals rose from the ruins and conquered the world. About 65 million years ago, when huge meteorites hit the earth and cleared dinosaurs, the earth…
In chemistry, many substances are highly toxic, such as heavy metals, cyanides, and some alkaloids, which can kill people invisible and are the poisons commonly…
The old saying goes, “The eyes are the windows of the soul.” Familiar people can recognize each other through their eyes. It is obvious that…
We call the ocean more than 1000 meters deep into the deep sea. At this depth, there is basically no trace of sunlight, and it…