How did life originate?

But for some questions, scientists still can't answer and explain. As scientists learn more about animal thinking, they increasingly agree with the view that animal behavior is not just an instinctive reaction, but a subconscious reaction, and their ideological entities enable them to perceive emotions-even humor. Some people think this is a very confusing idea, because animals must fulfill their obligations if they want to enjoy power. However, they seem to ignore the fact that we often allow many people to enjoy rights without obligations. For example, among humans, young children, the elderly and the mentally ill are legally entitled to be exempted from criminal responsibility and other sanctions, while animals are not. Some scientists suspect that life originated underground or near volcanic eruptions. Or perhaps, life originated in the universe and arrived at a meteorite or comet with a certain fixed form. Other scientists speculate that a microorganism is the ancestor of all life on earth. About 3 billion years ago, when Mars was warm and humid and the earth was just a dry and cold desert, these single microorganisms flew to the earth with the explosive fragments of Martian rocks. According to this statement, we are all Martians. However, so far, all these speculations have not been confirmed, so they are not convincing. The origin of life may be the most profound secret in the universe. Was I the same as I am now? "Am I still the same as I was a minute ago?" What a strange question this sounds! However, this is the most troublesome problem in the whole philosophy of science, that is, the problem of identity. On the surface, the answer should obviously be: of course, I am still the same as I was a minute ago. However, please think it over. Ten minutes ago, what every cell in your brain did was very different from what brain cells do now. Every few years, your body is almost completely replaced. If Britain's most famous sailing ship "Cutty Sark" that was burnt down in those years can be rebuilt, will it be exactly the same as the "Cutty Sark" that sailed at sea 150 years ago after it was built with new wood and various other new parts? In this regard, the purist's answer is: "No". So that you will never be the same as when you were a child. This question shows that our consideration of ourselves often conflicts with what actually happened, which seems to imply: should people be responsible for the crimes they committed decades ago? How can we identify with a person's identity, based on DNA or something more vague? Our identity is still a very illusory thing to a large extent. If the rivers are the same when they flow through the same channel, then in the long river of time, we are still the same as before. However, it is obvious that the water, ripples and eddies in the river are changing every second. "Abnormal phenomena" should include religion, "spiritual" power, nonsense in the new era, astrology, card divination and homeopathy. Scientists have reason to think that anomalies are a pseudo-science of grandstanding. These crystal therapists, therapists, astrologers, and even food gurus are always talking nonsense in stupid coats, seeking fame and gain everywhere. On the other hand, scientists are rigorous and rational in their research, and often publish the latest research results in famous academic journals. There is a joke that time is nature's magic weapon to stop everything in the world from moving at the same time. Time can define our life, because we measure our life with time. However, in front of the question of what time is, we are as ignorant as the ancients. Of course, this does not mean that we don't know what time has done. Physicists, such as Einstein, have profound insights into the characteristics of time. So we can give time a symbol and then put it into different equations, so we can study many phenomena and draw conclusions. Science fiction writers say it is possible, and to our surprise, physicists think so, too. However, before we build a time machine, we need to grasp the elusive and fleeting thing of time. In the end, we will solve all these mysteries. However, in that case, there will definitely be more mysteries. Perhaps, the only comfort is that on the day when we finally solve all the mysteries, if there is such a day, everything will become dull. Why is obesity increasing? 100 years ago, there was almost no obesity in the world. 100 years, obesity has become an unprecedented crisis in human history. According to the present situation, we will be more and more overweight. The reasons for obesity are obvious: eating too much and exercising too little. But the situation is far more than that. First of all, few people realize that in most "obese" countries in the west, such as the United States, people consume much less calories than they did 50 years ago. Compared with people in 1950, we seldom walk, but drive a lot. 1980 obesity began to prevail, and compared with that time, we have done a lot less exercise. Many scientists believe that there must be a profound mystery behind the obesity epidemic. Some scientists have said that obesity may be caused by a virus and can also be explained by genetics, rather than simply absorbing and consuming calories. Can I live forever? You may or may not. Aging-especially preventing aging-is one of the last issues that scientists want to talk about, because it will bring a series of annoying problems such as morality and ethics. According to the evolutionary theory of aging, our physical function begins to decline because in the "wild", we expect to die of cold, hunger and fierce tigers at the age of 30-50. But if we don't live that long, we don't need evolution at all to deal with diseases in old age. However, this can't explain what changes change our genetic clock when we get old, making our skin dry, our hair white and our bones brittle. Only by truly understanding what causes this change can we take measures to fight aging.