These days, Prague Square is bustling with people every day. Looking at the tourists coming and going, a man in his fifties had a pair of extremely lonely eyes, an expression that had almost never appeared on his face, especially in the past twenty years.

He had a lovely daughter, a noble and dignified wife, a charming and considerate lover, often full of friends, and a lot of talented people, but in these twenty years no one could really understand his innermost feelings.

Under the sunset, the colorful cute dragonflies are still performing aerial ballet in the laughter and laughter of visitors, and the audience is full of joy, and a man who sits there is full of a sense of disobedience.

This man is the Emperor Tangning, who is admired or feared by all the people on the earth, half a month ago he was extremely happy, as if he had no heart or lungs, but just 15 days later, a wave of dizziness hit, he fell unconscious, the bodyguards were frightened, and quickly sent the emperor to the hospital for rescue.

In the middle of the road, Tang Ning actually woke up again, and everyone breathed a sigh of relief, which was really sad and happy. No one understood what had happened to Tangning, only he knew it in his own heart.

A crisp laugh broke his myth, and he looked up to see the world's most powerful woman standing in front of him like a little girl, giggling for a while, and said, "I knew you were doing a ghost!" ”

Downing instinctively forced a smile and didn't say anything.

The little girl then said, "What? Not feeling well? The face is ugly! She stretched out her soft little palm and covered his forehead, "There's no fever." ”

He smiled embarrassed again, sighed softly, and said, "It just so happened that I have a story to tell you." ”

His expression was very abnormal, but Lin Fei was not afraid, she was now full of confidence, she had the power to look down on the world, any difficulties could be overcome, the Earth Empire was about to be established, she would be the "co-founder" with her master, what else could be more powerful and famous in history?

She still underestimated the shock and incredibleness of the story her master was about to tell her.

In search of a quiet place to tell stories, they left the square.

There is a river called Vltava that runs through Prague and is like the soul of the city. They came to a stone bridge over the river, and the fresh smell came to their faces, as if they were still scented with the bohemian forest. There are more than a dozen bridges on the Vltava River, and the oldest one they visited is 700 years old, and it was named Charles Bridge in 1870.

A small patch of multicolored light appeared in the distance on the surface of the Vltava River.

Linfell: "Huh? He asked strangely, "What kind of light is that?" ”

Downing said softly in a voice warmer than a fireplace, "That's the flying insect that was attracted by the beauty of Her Majesty Queen Phil. ”

Linfield chuckled, thinking Downing was joking. But would Downing make such a nonsensical joke? Of course not. So, she really saw the flying insects with the brilliance of the streamer.

"It's a dragonfly! It also glows! "Queen Lin will only become startled and innocent in front of Master Tang, and she almost slapped her little slap.

Luminous fish can be wholeed, isn't the glowing dragonfly a natural invention? This was supposed to be the grand finale of the surprise that Downing wanted to give visitors to Prague, but now that Queen Lin is here, let her see one of the most beautiful scenery in the world, the dance of colorful streamers and dragonflies.

The dancing light dragonflies made the visitors on the Charles Bridge scream in surprise, and the atmosphere was very hot.

A street musician excitedly played the cheerful violin, which caused all the visitors to dance.

Tang Ning is not in a hurry to tell a story, he has a lifetime of time.

After half an hour, he quietly instructed the Colorful Dragonfly Dance Troupe to leave, and in the midst of his full enjoyment, the tourists gradually became less crowded.

"What a perfect night...... "Linfield whispered softly as he looked in the direction in which the dragonfly had disappeared, "it would have been more perfect if the story that the master had told later was also a good story." I don't think it's going to be a good story, though, is it? ”

Tang Ning was silent for a long time before he said lightly: "That...... Do you still want to hear it? ”

Linfil was also silent for a while, and said, "Say it." ”

Tang Ning sorted out his thoughts and said, "Guess, in the past billions of years, has there ever been an immortal creature on the earth?" ”

Lin Fei was brought into a strange state of mind by Downing's strange tone, and said: "There should be none, because immortality leads to the lack of diversity of offspring, which is not conducive to the survival of the entire species, and under such cruel competition, the creatures that once lived a long time should be extinct." ”

When it comes to biology, Downing seems to have forgotten his sorrow and said energetically: "Actually, there is. And this creature has lived until now, in the beautiful Mediterranean. ”

Linfil's eyes widened as he looked at his master, his heart surging.

Downing: "My story begins with this immortal creature. It is a beautiful, mysterious sea spirit, a kind of jellyfish. To understand why it is immortal, we must first understand the life cycle of jellyfish. The life cycle of an ordinary jellyfish is only about one year.

In this short year, jellyfish will exist in six forms, which is much more powerful than insects such as silkworms and butterflies.

One of the great evidences of biological evolution is the existence of intermediate organisms, such as the platypus, which is both a mammal and an oviparous, and the Archaeopteryx, which is both a bird and a dinosaur. Our jellyfish are capable of both asexual and sexual reproduction.

In the case of sexual reproduction, the male inserts sperm into the egg at the base of the mouth and wrist of the female jellyfish, where there is a nursery sac where the fertilized egg continues to develop until 0. 2 mm in size, it has fine cilia around its body and can swim in the water, so it leaves its mother's body.

The jellyfish form at this time is called 'floating larvae'.

The larvae wander until they find a reef and begin to settle down, gradually developing into a 'polyp' of about 2 mm. The polyp body is somewhat similar to the sea anemone and belongs to the phylum cnidarians. A jellyfish is an animal that crosses the phylum Zodias during its lifetime, and at this time it belongs to the phylum Cnidarians.

Jellyfish of this generation can divide and reproduce, splitting their bodies longitudinally into two segments. It is also possible to sprout and reproduce, and new polyps grow on the body. It is important for a generation to strengthen the impression.

The third generation is the 'transverse split'. This is when the polyp body grows to a certain stage and begins to grow longitudinally, and there are layered depressions, like layers of red chrysanthemums stacked on top of each other. Each layer of red chrysanthemums will fall off at the end and become the fourth generation of 'saucers', at this time it is already a bit like a primitive jellyfish, you imagine a chrysanthemum-like saucer.

The height of a transverse fissure is one centimeter, while the diameter of a saucer is 2 or 3 millimeters.

The upper part of the saucer develops into a canopy, which grows in size until it grows to about 7 or 8 mm, and its mouth and wrist grow out of the canopy. This generation is known as 'jellyfish larvae'.

The sixth generation, and the last, finally grew into a real jellyfish, with a body of only about 1 when it was formed. About 5 cm.

Many jellyfish have the ability to control the size of their bodies, and when there is plenty of food, they become larger, and when food is scarce, they become smaller.

The one in the Mediterranean has evolved a miracle - it has always remained quite small, and when it is short of food or injured, it reverts back to its polyp state.

Let's take a look back at these 6 generations: Floaty larvae, polyid, transection, saucer, jellyfish larvae, jellyfish. The polyp is a fairly primitive form, its energy consumption, food needs have been reduced to a minimum, and the ability to reproduce asexually can be described as super powerful.

This jellyfish that can return to its original state is called the 'lighthouse jellyfish' because it looks like a lighthouse. As long as it is not eaten by other predators, or dies unexpectedly, it can be reincarnated forever in the form of jellyfish and polyids, which is what we call 'eternal life'. ”

As a science fan, Senior Sister Lin listened attentively, and then said: "It's really a good science story, Master knows a lot, which team sued you?" How dare you say that biology is a cycle of eternal life after it has not been many years old? I have reservations about the indefinite proliferation of cancer cells. ”

Tang Ning: "This project has been studied for a long time, and the longest number of observations is 50 years. For 50 years, the reincarnation of the lighthouse jellyfish has been going on without any signs of decay. As a result, scientists deduced that it was an immortal creature, and a team based on it carried out a longevity program for advanced animals.

My father and mother, both super science fans and scientists themselves, decided to participate in the clinical practice of the first human 'rejuvenation program', and as a result, there were the first babies with the ability to rejuvenate, and I was one of them, which means that I had a large number of lighthouse jellyfish genes in my genes. ”

"Huh?!" Lin Fei suddenly retracted her gaze, stared at her master with round eyes, and in an instant her good master and lover turned into a monster, a gene transfer person? Fifty years ago?

"Master...... It's not kidding me, is it? Scientists fifty years ago were capable of doing such a thing. Don't say that fifty years ago, even now, I know exactly what your team is doing! "Linfield was a little crazy.

Downing: "That was just an appetizer before the story, now let's get to the point - actually, master, I'm not from your earth." You just have to think about it and immediately understand, how can a scientist, an inventor, no matter how great a genius can understand everything and do anything like me? There is only one possibility - I am an 'other'. Not of you mortals. ”