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Believe in science
Genetics Since the 20th century, it has been believed that gene mutation occurs randomly, and the difference of gene frequency appears in the population under the action of natural selection. However, a recent study of Arabidopsis thaliana (Arabidopsis thaliana), published in Nature, challenges this view.
By gaisndm Hawkshaw3 years ago in Earth
Believe in science
Medical science Nine days after the pig heart transplant, a 57-year-old American man can walk on the ground. On January 7, a team from the University of Maryland School of Medicine said it had performed the world's first pig heart transplant on a 57-year-old man with terminal heart disease. According to China Business report, Professor Wu Zhongjun, director of the artificial organs Laboratory at the University of Maryland, revealed on January 15 that the patient had left ECMO (extracorporeal membrane oxygenation, which can provide long-term cardiopulmonary support) two days ago, and began to walk on the ground one day ago. A team of doctors at the University of Maryland said it would monitor patients' immune response and heart function and would continue to conduct controlled clinical trials.
By gaisndm Hawkshaw3 years ago in Earth
The lungs of the earth, the Amazon rainforest, the paradise of animals is a forbidden zone for human beings, and there are dangers everywhere
As we all know, human beings have not yet fully explored the "underwater world", and the depths of the ocean are unknown and mysterious to us.
By suzanne darlene3 years ago in Earth
Dragonfly: The "king" of flying, scientists have been studying for decades, but have been unable to understand its technology
When people talk about objects that can fly freely, people generally think of birds and airplanes. Birds are small animals that are born with the ability to fly, and airplanes are our most outstanding inventions in modern times. in the infinite sky.
By crudden elle3 years ago in Earth
变异毒株出现后,“拔牙”将面临失效
When the ASF outbreak occurred for the first time, the major pig farms came up with a "tooth extraction" plan based on biosafety through repeated practice. As soon as this plan came out, major farms scrambled to imitate it, and the effect was satisfactory. However, due to the emergence of the natural variant of African swine fever genotype II with low lethality, the plan encountered serious challenges: failure or high culling rate.
By crudden elle3 years ago in Earth










