Did you ever wonder how somebody ever figured out all the details of making a cellphone system work? What about those giant MRI machines that can take a picture of your insides without a single incision? Then there is the universe. We think we know at least something about how it started billions of years ago and where it’s going billions of years in the future. How can we possibly know anything about an event that occurred 14 billion years ago? Science is too often presented either as a huge database of facts or as an endeavor that is open only to a highly educated group of elite thinkers. It is neither of these. In its essence, science is a process, a way of looking at a question and finding an answer. Step-by-step, scientists look at a problem and ask, “How can I test this to see if it is true?” Asking one question at a time, they have built a body of knowledge too vast to be held in single library. [download]
Format : Ebook.Pdf
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