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POPSA few Impossible Advances Energy and Momentum Non-Conservation. There will never be a way to increase the available energy or change the net momentum in a closed system.
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POPSHuman Knowledge-Foundations and Limits-Brian Holtz There are many more questions discussed, but there was enough room to provide some examples. He is asking the kinds of questions, that while profound, must be considered as answerable if we are to understand where we stand in the universe, and where we have the ability to go.
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POPSWhat Are You Optimistic About? - The Edge Annual Question 2007 The Edge asks a very interesting question to a whole bunch of leading thinkers, scientists, philosophers, etc. each year. This is this years question. Last years question was: "What is your Dangerous Idea"? Question of 2005 was " What do you believe is true even though you cannot prove it ? I only clipped a tiny selection of the candidates & links to their answers of this years question. It's a great resource. Really worth checking out. Just click one of the links I clipped & feed yourselves with some optimism. ( ;-) to invictus)
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POPSThe Law of Accelerating Returns Huge article by Kurzweil. For those who don't want to read it all, I clipped a podcast by Kurzweil on about the same topic here: http://clipmarks.com/clipmark/1F536D62-B35C-48B1-A504-20B49C6F86E3/