368 pages | Penguin Group (2008) | English | ISBN: 1592612862 | PDF | 8 MB
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?
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