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Welcome to my host of knowledge. My general aim is to explain and train people in the areas of health, sports and technology. Many things I have already seen, and I try to give you trusted sources of knowledge, which are most of the time people and institutes of the best universities in the world. But even this trusted sources you could scrutinize. Don’t be shy asking questions. There are always more questions than answers. Be aware of some called experts which only have answers to questions. Good experts have more questions than answers. Stay hungry, stay sceptical. (but not sceptical in the way: I don’t believe scientific facts… there are facts which are facts: Like the ground force ?