【Today's Cover】
Yang Zhuoyong is mistakenly called Yanghu Lake, which means "Jasper Lake" in Tibetan, located between Langkazi County and Gongga County in Shannan, Tibet, and is called the three "holy lakes" of Tibet together with Namtso and Mapanyongcuo. Recently, the ice and snow on the lake have gradually melted, showing a beautiful scene of "half lake ice and snow and half lake waves". Photo by Jiang Feibo
Message stations
Source: China Net
●On March 22, the joint prevention and control mechanism of the State Council held a press conference. Mi Feng, spokesman for the National Health Commission, said that the current is the most difficult critical period for epidemic prevention and control. "At present, the number of new local infections across the country is still increasing rapidly, and the situation of epidemic prevention and control is still severe and complex. Resolute measures should be taken to curb the spread of the epidemic as soon as possible. (Source: CCTV News)
●On March 21, the calibration test of the last high-thrust hydrogen-oxygen engine of the Long March 5B Yaosi carrier rocket was successful. It is reported that the test starts according to the predetermined procedure, the engine works for 100 seconds, shuts down according to the predetermined procedure, the test system works normally, the engine parameters are normal, the function and performance of the high-thrust hydrogen-oxygen engine meet the overall technical requirements of the rocket, and the rocket assembly will be delivered to the space station experimental module launch task this year. (Source: Science and Technology Daily)
●A few days ago, the National Medical Security Bureau agreed to henan province and Chongqing municipal medical insurance bureau to temporarily add a "new coronavirus antigen detection" price item, 5 yuan each time; antigen detection reagents (including sampling devices) zero difference rate sales; public medical institutions to carry out antigen testing services in accordance with the "price items + test reagents" method of charging. Where the sum of the costs of a single novel coronavirus antigen testing service and reagents (including sampling apparatus) exceeds 15 yuan / time, the actual fee is capped at 15 yuan / time; if the masses simply test for antigens, public medical institutions are exempt from outpatient consultation fees; where patients test themselves, public medical institutions must not charge "new coronavirus antigen testing" project fees and other price policies. (Source: China News Network)
Image source: CCTV News
● Yuanwang No. 5 ship sailed away from the dock of the China Satellite Maritime Measurement and Control Department on the 22nd and went to the Pacific Ocean and other seas to perform measurement and control tasks. It is understood that the Yuanwang No. 5 ship has just completed the transformation and upgrading of ship repair technology for more than 50 days, which has greatly improved the navigation power and navigation safety performance, and the reliability and operability of special equipment have become stronger. (Source: Xinhua News Agency)
New discoveries
Physicists pioneered a new laser heating technique in the diamond anvil trough to discover a new type of ice. Image source: Chris Higgins
Recently, researchers at the University of Nevada, Las Vegas have created a new method to measure the properties of high-pressure sewage, which has led to the discovery of a new type of ice "Ice VIIt". This is a transitional form between two known forms of ice, consisting of symmetrical tetragonal crystals. The paper was published in Physical Review B. (Source: China Science Daily)
Pure technology
Courtesy of Shenzhen Huada Life Science Research Institute
●Recently, researchers from the Chinese Academy of Sciences and Shenzhen Huada Institute of Life Sciences and other institutions have cultivated human totem stem cells similar to the 3-day state of fertilized egg development through somatic cell induction, which is currently the "youngest" human cell cultured in vitro in the world, and is another subversive breakthrough in the field of regenerative medicine after scientists successfully induced human pluripotent stem cells. (Source: Science and Technology Daily)
This image shows a life-size model of part of a bronchial tree constructed from anatomical data. On the right is part of the magnetic tentacle robot. Source: University of Leeds, UK
According to a paper published in the journal "Soft Robotics" on the 21st, a team of engineers, scientists and clinicians from the STORM Laboratory at the University of Leeds in the United Kingdom has developed a "magnetic tentacle robot" with a diameter of only 2 mm that can be guided by magnets outside the patient's body into the narrowed ducts of the lungs. It has been shown that such robots can reach the smallest bronchi in the lungs and can take tissue samples or provide cancer treatment. (Source: Science and Technology Daily)
Look at the world
图源：Observing the Earth
Recently, a new analysis shows that the smoke from Australia's record wildfires drifted so high that the stratosphere's ozone layer was destroyed. Between November 2019 and January 2020, the "Black Summer" forest fires on the country's east coast caused unprecedented damage. Now, Peter Bernath and colleagues at O'TD University in the United States have shown that the smoke also spreads upward into the stratosphere and triggers a chemical reaction that destroys ozone. (Source: China Science Daily)
Editor: Zhang Aijia (Intern) Liu Yiyang
Review: Wang Xiaolong
Final Judgement: Wang Yu