I Have A Super USB Drive

　　 "Human life is limited, everyone will be born, old, sick, and die, but does anyone know why we live, old, sick, and die?"

　　 On the podium, a very young professor said slowly that the sound echoed in the spacious large classroom through the sound.

　　 "As we all know, the unit of life is the cell. Every one of us here is split from a small fertilized egg cell."

　　 "One becomes two, two becomes four, four becomes eight..."

　　 Under the podium, Chen Chen squeezed his chin and turned his gel pen in his right hand, staring at the projection screen madly.

　　 "Cells will also age and die. Newly dividing cells continue to replace apoptotic cells. This is the secret of our continuous growth."

　　 "However, this division is not infinite."

　　 "In 1965, Professor Hayflick of Stanford University discovered that human cells cannot replicate themselves more than 57 times. Each cell will die after 56 replications."

　　 "It's like, there is a counter in the cell, which determines when the cell will stop dividing and when the person will grow old..."

　　"Theoretically, human cells can divide up to 56 times. According to the calculation of the cell division cycle, the life limit of a person should be about 120 years old. This theory is called..."

　　 "Pattern!"

　　 Just when he was fascinated by it, Chen Chen suddenly slid his finger and flew the gel pen out and fell under the table.

　　 Chen Chen immediately bent over and reached out to touch the ground.

"Ok?"

　　 Just when his head was lowered below the table, inadvertently, a dark light came into his eyes.

　　 Don't ask why the light is still black. At the moment of bending down, Chen Chen did see a black light.

　　 He looked subconsciously.

　　 It is a long strip of things, completely dark, it is stuck under the table, and is embedded in a hidden groove.

　　 So, after picking up the pen, Chen Chen extended his arm again and squeezed towards that position.

　　 With a slight force, only a click, the dark thing was successfully pulled off.

　　 "The student who is under the table over there, you can answer—"

　　 But at this moment, the professor's voice suddenly came from the podium.

　　 "Puff!"

　　 There was a low laugh from the dorm buddies behind him.

　　 Chen Chen quickly got out from under the table, his face flushed with embarrassment.

　　 He looked at the professor who was still smiling, then looked down at the textbook, and then he stumbled and said, "Hay, Hayflick limit?"

　　 "Please sit down."

Professor 　　 pressed his hand, let Chen Chen sit down.

　　 Lecture continues.

　　 "At both ends of the DNA, there is a kind of ‘telomere’. This kind of thing plays a vital role in cell division."

　　 "It is responsible for keeping the chromosomes intact. Every time a cell divides, the telomeres become shorter. When the telomeres are too short to protect the gene structure, the cell will inhibit growth, stop copying, and enter aging."

　　 "This is the Hayflick limit."

　　 As he spoke, the professor turned around and quickly wrote the six words "Haflik Limit" on the blackboard.

　　 Chen Chen, who sat down again, breathed a sigh of relief. Taking advantage of the professor's turning around and writing, he quickly picked up the things in his hand and took a look.

　　Emmmmm……

　　 This glance made Chen Chen completely deprived of interest.

　　 It turns out that the black thing is nothing but a USB flash drive.

　　 Different from the USB flash drives on the market, the length of this USB flash drive is much longer than that of ordinary USB flash drives. It measures twelve or three centimeters and looks like a carbon rod.

　　Only the USB interface exposes the fact that it is only a U disk.

　　 In addition, the entire U disk is completely integrated, completely black, and even trademarks and memory logos do not exist.

　　 But for the sake of the cool style, Chen Chen finally put the USB flash drive into his trouser pocket, and waited for the dorm to study.

　　At this time, the professor continued to lecture: "With the current level of technology, it is impossible for cells to break the Hayflick limit, but we can also bypass this problem in other ways..."

　　 said, the professor wrote five words on the blackboard again:

　　 The immortal Hela.

　　 "Everyone will definitely think, if there is a way to prevent telomeres from wearing out, can our cells live forever?"

　　 "The answer is yes!"

Professor 　　 excitedly added the words "HeLa cell line" under "The Immortal HeLa".

　　 "The Hela cell line is a cell line isolated from human cervical cancer tissue in 1951, and its contributor is Herita Larks."

　　 "Researchers found that the cells collected from Lacus did not die, but showed signs of growth. The number of cells doubled every 24 hours."

　　 "Later it was discovered that the reason for the immortality of these cells was the RT tumor virus that causes cervical cancer. The genes of this virus can change the'switch' of normal cell lifespan, thereby making the cells immortal and multiplying indefinitely."

"In the years to come, HeLa cells were provided to research institutions across the federal government. They helped scientists realize cell cloning, were used to investigate the effects of nuclear radiation on the human body, and were also used on rockets to space to study weightlessness. Cell proliferation in the state..."

　　 "According to data from the Medical and Biological Database, as of this year, there have been more than 65,000 papers related to HeLa cells, and more than 50 million tons of HeLa cells have been cultivated..."

　　 "So, there is a common sense that everyone knows for later generations-cancer cell lines are'immortal', as long as there is a suitable culture environment, it can divide indefinitely."

　　 At this point, many students in the audience began to applaud spontaneously. This is a tribute to the contributor.

　　 "Of course, if we humans use this ‘switch’, it’s the way to die!"

　　Professor turned the topic and suppressed applause.

　　 "After all, if the cell division cycle in our body is disrupted and cannot age on time, it will turn into a malignant tumor, threatening our lives!"

　　 "We humans are constantly advancing on the road of pursuing the truth. As early as the clan society, the average life span of humans was less than 20 years old, but by the Middle Ages, the average life span of humans has increased to 40 years..."

　　 "With the advent of science, human civilization has completely entered a period of rapid development. In just a few decades, the average life span of the Earth Federation has approached 80 years!"

　　 "But is that enough?"

　　 "Even if mankind develops to the extreme, it is only 120 years old as Heflick's limit said, which is far from the level of immortality, so what should we do?"

　　 After a pause, the professor continued.

　　 "So, here comes a turnaround..."

"In 2002, this'switch' was finally found. UU Reading www.uukanshu.com Cambridge University Professor John Sulston and three others discovered a genetic regulation mechanism called'programmed cell death' ."

Professor 　　 once again wrote the words "programmed cell death" on the blackboard and drew a circle again.

　　 clicked, because the fingers were too hard, the chalk suddenly broke.

　　 "This discovery shocked the entire medical community, because it believes that cell death is a physiological and active ‘suicide’, like a programmed procedure!"

Professor 　　 opened his hands, "In other words, we think that aging is a natural process, but in fact it may be a genetic defect! If we can repair this defect, we can hope to overcome aging and gain immortality!"

　　 The audience suddenly whispered.

　　 As if a brand new door had been opened, Chen Chen's pupils shrank and repeated the two magic words with a voice that only he could hear.

　　 "Eternal life?"

　　 "Eternal life..."

　　 "Therefore, as a major of biological science, you are the most promising generation to repair genetic defects."

Professor 　　 had an expectant smile on his face, "Or you can say that you are the generation closest to immortality in human history!"

The 　　 course has come to an end at this time.

　　 The silver-haired professor took the handkerchief and wiped his sweat, and concluded with expectation and sigh:

　　 "I have to say that we humans still know nothing about the vast sea of ​​truth. Perhaps even the unreachable dream of immortality is just the first step in the pursuit of truth..."

　　 "But anyway, the future belongs to you..."

　　 "Alright, get out of class is over!"

　　 Papa Papa Papa Papa...

　　 The audience suddenly burst into applause.