"The signal of 9.8 million megahertz may be a call from other civilizations." At 7 pm on December 29, the " 2022 New Year's Eve Scientific Speech" officially started in the " Institute of Physics, Chinese Academy of Sciences" on time in the " Institute of Physics, Chinese Academy of Sciences" Douyin live broadcast room. In his first speech, Chinese Academy of Sciences academician Wu Xiangping explained the mystery of Big Bang in an easy-to-understand manner, and answered a question from a child from Tianyan Town, Guizhou in detail: Are there any aliens in the universe? Three scientists including Cai Tao, Guan Yixin, Zhang Wei introduced the most important innovative achievements of the Chinese Academy of Sciences in the past year in easy-to-understand language.
More than 400,000 people watched this live broadcast. During the knowledge feast of more than two hours, netizens from all over the country actively checked in and discussed the cutting-edge knowledge shared in the speech in the comment section. At 7 pm on December 30 and 31, there are two scientists' speeches, using hard-core popular science knowledge to accompany everyone to welcome the New Year.
Chinese Academy of Sciences Wu Xiangping: In the eyes of astronomers, the universe is still a baby, and it is still growing up
29 At the beginning of his speech on the evening of 29, Academician Wu Xiangping turned his attention to the vast universe. "More than 2,500 years ago, our ancestors named the name "universe". So far, this definition is still accurate. The universe is the upper and lower four directions, the universe is from ancient times to the present, and the universe is the sum of time and space." From this, he led to the question of "how big the universe is." He explained that the current cosmic scale that humans can observe is only 45.3 billion light-years, and the distance of more than 45.3 billion light-years may still be the universe, but it has exceeded the visible range of humans at present.
Immediately afterwards, Academician Wu Xiangping explained how scientists discovered that a big explosion occurred in the universe in history. In the 1920s, American astronomer Hubble discovered during observation that the stars in the distance were moving away from the earth, and the farther they went, the faster they ran. From this, scientists judged that the universe is expanding, and based on this, the Big Bang theory was developed. He mentioned that to this day, ordinary people can still find the "noise" left by the Big Bang in the snowflakes of old-style antenna TVs.
When answering a question from the Datang station of Yitong Paradise, Tianyan Town, Guizhou, Academician Wu Xiangping introduced the scientists' exploration of whether there are other civilizations in the universe. Academician Wu Xiangping shared that two months ago, Australian scientists monitored a cosmic signal with a frequency of 9.8 million megahertz, and human interference has been eliminated. "Maybe this is a call from other civilizations."
Associate researcher Cai Tao, an associate researcher at Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences: We have gone through artificial design and re-traceed natural evolution
After the speech of Academician Wu Xiangping, , Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, , Cai Tao, an associate researcher at Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, introduced the story behind the major breakthrough in artificial synthetic starch with the title "Turn waste into treasure: From carbon dioxide to starch". Associate Researcher Cai Tao concluded that exploring the process of artificial synthesis of starch is essentially a process of evolution in nature that lasts hundreds of millions of years in a few years. He introduced that the technology is still at the laboratory level and may have a significant impact in the fields of agricultural production, industrial carbon reduction and other fields in the future, helping us achieve the carbon neutrality goal faster.
Guan Yixin, a researcher at the Institute of Geography and Agricultural Ecology of the Chinese Academy of Sciences: After nearly 20 years of exploration, it has become possible to protect black soil
Guan Yixin, a researcher at the Institute of Geography and Agricultural Ecology of the Chinese Academy of Sciences, introduced the topic of " black soil is a giant panda cultivated in my country" and gave a speech entitled ""Use well and raise well" Northeast Black Soil". Researcher Guan Yixin mentioned that the grain output of the Northeast black soil accounts for one-quarter of the country, and the commercial grain transferred accounts for one-third of the country's share. "At least one of the three bowls of rice we all eat comes from the Northeast black soil." Therefore, preventing the further degradation of black soil and restoring the fertility of black soil have become the focus of scientists' research in the past few decades. At present, through technologies such as protective tillage and crop rotation, black soil is gradually recovering.
Zhang Wei, a researcher at the Center for Space Application Engineering and Technology of the Chinese Academy of Sciences: In the space laboratory stage, thousands of experimental projects are being planned
Zhang Wei, a researcher at the Center for Space Application Engineering and Technology of the Chinese Academy of Sciences, is the last scientist who gave a speech. Like Academician Wu Xiangping, he turned his vision to the vast universe. In his speech at Researcher Zhang Wei's "The Wonderful Space Science Experiment", he introduced in detail various scientific experiments designed in the Tiangong Space Station. This includes both biological experiments that study how gravity shapes life on Earth, as well as materials experiments that explore the infinite possibilities of metals. These experiments are not only cool in design, but also possible to make unexpected breakthroughs and bring changes to our real life. The first live broadcast, which was originally scheduled to end at 9 pm, was "dragged" for nearly 15 minutes with the enthusiasm of scientists and netizens. After the host announced the end, many netizens were still unsatisfied and praised the live broadcast in the comment area. Some netizens said that although there is a lot of content that I still can't understand, they are still attracted by the vivid and interesting explanations of several scientists. Some netizens even commented on the live broadcast: It may be the New Year's Eve speech with the highest knowledge content.
It is reported that the Chinese Academy of Sciences' New Year's Eve scientific speech is sponsored by the Science Communication Bureau of the Chinese Academy of Sciences and hosted by the Institute of Physics, Chinese Academy of Sciences and TikTok. (Wang Lei)
Source: Guangming.com
