In life, we often encounter some problems and want to know the answers, but we have no way of knowing. For example: Can you really not drink canned drinks with your mouth? Do new mobile phones have to be charged for 8 hours? Is laser correction of myopia reliable? Can cacti really protect against radiation? Many people can't answer. This book collects many questions in life that we don't know the answers to, and then gives scientific answers and explanations. Astronomy and geography, life encyclopedia, five thousand years, etc., There are all kinds of strange knowledge, telling you the truth that 99% of people cannot know! This knowledge is magical. Not only is it useful, it can also inspire thinking, broaden horizons, and arouse a strong desire for knowledge.
These are all common sense questions