At present, the largest bird in the world is the African ostrich, which can weigh more than 300 catties, which is about the same as many fat houses.

The combat effectiveness of the fat house is generally equal to 0.5 geese, that is to say, two fat houses can be tied with a big goose, and the three hundred pounds of African ostriches, running at a speed of 70 kilometers per hour, can trample a big goose to death with one foot, so in the case of similar weight, the fat house meets an African ostrich, must not act rashly, please be more careful!

Although the African ostrich is big, it is nothing in Liu Chang'an's knowledge, not to mention that its feathers are also very short, so the down feathers in Liu Changan's hands must have nothing to do with the ostrich.

"Now the longest feathered bird in the world is the long-tailed chicken, which can reach more than seven meters in length, and forty years ago there was a long-tailed chicken with a tail feather of thirteen meters, which means that if it stands on the fourth floor, its tail feathers can be dragged to the ground below. Liu Changan learned about birds from his extensive knowledge and said to himself.

"I thought it was a peacock. Li Hongfang said embarrassedly, it should be not only his own opinion, but also that ordinary people with little knowledge will think so.

Li Hongfang is not a bird researcher or enthusiast, but she is a hobby and collector of Song paintings, and she told Liu Changan about this when Liu Changan sent her to pick up "The Riverside Scene at Qingming Festival".

Li Hongfang has appreciated a lot of Song paintings, Song paintings of flowers and birds are the pinnacle, Li Hongfang has seen quite a lot of birds, but the birds in Song paintings are basically small birds, the biggest is the eagle and the peacock, so it is normal to have the impression that the peacock's tail feathers are the longest.

Long-tailed chicken is an artificial breed that has only been cultivated in the last two or three hundred years, Li Hongfang has not seen it in Song paintings, naturally it is not familiar, even if it has been seen in the zoo, the impression will not be deep, everyone goes to the zoo to see the animal species that have not been eaten, everyone has eaten chickens, even if the tail is long, it is not interesting.

"Could it be that this is the feathers of the red long-tailed chicken?" Li Hongfang said in accordance with Liu Changan's words.

"It's not. The tail feathers of the long-tailed chicken are long enough, but they are not large. With down feathers the size of a normal folding fan, this bird is estimated to be larger than a heavy fighter jet as soon as it spreads its wings. You imagine a bird about the size of a J20 falling from the sky......"

"How big is the J20? I know it's the most powerful fourth-generation heavy fighter in the world. Li Hongfang nodded with a little understanding, such a big bird must have been extinct, and only this hair in front of him remained.

"Beware of engine warnings. Liu Changan smiled, "It's more than twenty meters long, and it's more than ten meters wide...... The bird's wingspan must have been more than ten meters wide...... That is, it is a little bigger than the heavy fighter. ”

"How can there be such a big bird? Li Hongfang thought for a while and shook his head again, "There shouldn't be a dinosaur era, and the largest flying dinosaur can't be so big, it's too big to fly, right......?" Maybe be able to glide with the help of the terrain. ”

"There was no dinosaur age, but there was one in the mythical age. Liu Changan pinched the down feather and irradiated the down feather with a flashlight.

Feeling that the red light was too dazzling with night vision glasses, Li Hongfang took off his eyes and stared directly at the down feather.

Li Hongfang can understand the age of dinosaurs, but what does the age of mythology mean?

Under the illumination of the flashlight, the down feather was bright red and dazzling, and the color seemed to be flowing blood, faintly exuding a crystal luster, with the texture of jade, and the vitality of blood.

Li Hongfang had never seen anything like this.

Liu Changan stretched out his hand and pressed the surface of the down feathers, and the thin fluff undulated like seaweed in the water, and the edges of the fluff rolled up, gently wrapped Liu Changan's fingers, climbed to the fingers and fell down, as if expressing intimate emotions.

"What does the Age of Mythology mean?" Li Hongfang also wanted to touch this feather, but she was a little frightened, since she had experienced the situation of watching a part of her body decay and die, and now there is still a psychological shadow, this mysterious and strange thing in front of her, a trace of fine fluff reminds Li Hongfang of what Shangguan Tang pulled out of her body.

That time, Shangguan Tang tied her arms with his arms, and hair was pulled out of her flesh, and a thin film of blood was condensed on the tips of Shangguan Tang's hair, which was smooth and flexible, like the down feathers in front of her eyes (Chapter 428).

Now it seems that the first time I entered this tomb, I was most likely marked by this down feather...... It can't be said that it is a plot, after all, what impact does it have on her, Li Hongfang doesn't know now, her body is in a state of decay and malaise, and she doesn't know if it has anything to do with this down feather.

"There was an era when giant beasts could swallow clouds and spit out fog and move mountains and seas. Liu Changan let out a long sigh, "Blue whales with a body length of tens of meters and a weight of two or three hundred tons were very common in that era. Argentine dinosaurs, herbivores that were thirty or forty meters long and about 100 tons, if they appeared in that era, would probably have been kept in captivity like lambs as a source of food. ”

"Is there such an era......? How many years ago was that?" Li Hongfang was terrified after imagining it, if ordinary people heard it, they would only tell myths and stories as Liu Changan, but after all, Li Hongfang had some special experiences and knew that the mysteries of this world were unimaginable.

Billions of years after the birth of the earth...... The number of billions of years is too large to feel like a number, but if someone can live for billions of years to slowly understand it, they will know how long it was.

In such a long period of time, any era may have been born, and even if someone can live for billions of years, it is impossible to experience all the eras, maybe they will miss it, and they will forget it...... Then modern people can only study the past through scientific and technological means, and study the era experienced by the earth, and what they probably understand is only a drop in the ocean.

"I don't know. Liu Changan shook his head, "Time is continuous and cannot be divided. The so-called units of time, the records of the times, are all things that human beings do themselves. What happened in those times that were not recorded and discovered by humans cannot be located on the scale of years invented by man. ”

"At that time, there were already human beings, but modern human beings did not find strong evidence of the existence of that era, so it seems that it never existed, and it was only regarded as a myth?" Li Hongfang thought for a while and nodded a little understandingly, "Just like the Xia Dynasty, even many highly developed civilization relics before the Xia Dynasty have been excavated, but they are still not recognized by the Western historical community as ancient as our civilization." ”

"Yes, I can't remember exactly, and I can't tell how many years it was...... I have to call it the age of mythology, but this feather ...... Maybe it's from that era. Liu Changan stared at the down feather, "There are dragons, and maybe there is still the era of phoenixes." ”

-

-

That one...... I'm just reminding me in a very gentle and friendly tone, don't popularize any more knowledge like the phoenix male and female, it's embarrassing to watch too much.