-
Anonymous users2024-02-13Today's earth has highly developed science and technology, and countless human beings are thriving in it. It's hard to imagine what this planet was like in the era of recklessness, hundreds of millions of years ago, in the nature and ocean, endless monsters were rampant, and even powerful dinosaurs could not be considered top-notch. But then again, why are creatures that used to be so big, but now they're so small?
The answer given by paleontologists is that the low oxygen content of the earth is caused. But I'm afraid you'll have to ask the monsters that were thousands of years old.
Centipedes like to burrow through the mud and occasionally run out on the road after rain to disgust people. Although they are ugly, they are not large in size, and people can trample them to death with a single foot, so there is really no deterrent. But if you were to go back in time to the Carboniferous period 400 million years ago, anyone would be terrified of centipedes.
The reason is simple, centipedes at that time were bigger than humans and were the rulers of the earth. It is no exaggeration to say that it was their most glorious era.
It is worth mentioning that centipedes at that time were not called centipedes, they were called Malu. Like modern centipedes, they preferred to live in cold, damp environments, lurking in the middle of the day, and unlike most creatures, they did not interfere with river water. However, they differ from centipedes in one way, and that is their toxicity.
According to fossil analysis, the ancient Malu did not have a venom gland, but it did have a stinky gland, which was its only means of self-defense.
But then again, it's a whopping three meters long. In the era before the dinosaurs appeared, there were few creatures in the entire natural world that could match them. It sits firmly at the top of the food chain, and can eat whoever it wants, and other animals can only run when they see it, and this ability to defend against enemies is of little use.
In fact, centipedes are not the only creatures that have become smaller due to reduced oxygen levels. Dragonflies 100 million years ago were also very huge, with an average body length of more than one meter, but now they have become such a miniature shape. It's embarrassing!
-
Anonymous users2024-02-12400 million years ago, the overlord of the earth, who could eat whoever he wanted, has now become the weakest reason for existence, mainly due to the continuous changes in the natural environment, many of which have been extinct, and some have been purified into other living things.
-
Anonymous users2024-02-11Because 400 million years ago, the environment was more suitable for the growth of animals, so insects are very huge.
-
Anonymous users2024-02-10Because the environment was too harsh when the dinosaurs became extinct, they had to change their body shape so that they could better survive on the earth, so they became so weak.
-
Anonymous users2024-02-09Because over time, the size of this animal has become smaller and smaller.
Based on the determination of the decay rate of radioactive materials on Earth, it is known that our Earth has existed for 4.6 billion years, that is, our Earth was born 4.6 billion years ago. >>>More
Hehe! The life span of the earth has been analyzed by the scientific community authoritatively, and the result is that it is only 100 million years, so 100 million should not exist, but there are other factors affecting him, the external factor is the sun first, because it is the closest to the earth, and the planet that can fate on the right earth That is to say, all the energy and power on the earth come from the sun, and once the sun has three long and two short, it will inevitably affect the earth. Before the 30s of this century, people always thought that the sun would one day burn out, turn from white to orange and then to red, and finally become a dark star that was silent, but its brilliant life. >>>More
You can think like this, but there is no evidence in reality, 1 billion years ago on the earth, multicellular organisms only appeared recently, and there is no sign of advanced civilization in the corresponding geological strata, so such an idea is nonsense. >>>More
In almost every corner of life, we can see the figure of **. In ancient times, ** is a very precious wealth, often when the emperor rewards, will be rewarded**100 taels or **1,000 taels, at that time, one or two ** can almost build a house, in modern times** it is not so valuable. However, when a person is engaged or married, they often need to buy ** to express their sincerity. >>>More
I think Malu was about 300 million years old in the late Paleozoic era. The largest arthropod, shaped like a millipede, is more than 2 meters long and about 2 meters wide.