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<blockquote data-quote="spiney" data-source="post: 109248" data-attributes="member: 192438">Unfortunately, the laws of conservation of energy prevent any such thing, quite simply you just can't do it! This rules out Cavorite, the Dean Drive, strange gyroscope arrangements, you name it!You can't use a waterfall to turn a waterwheel, and also use that waterwheel to pump enough water back uphill to keep itself turning. That's perpetual motion, if it were true, energy would just be created from nothing, and the wheel would spin ever faster and faster ......Unforunately, the opposite is happening, the universe is &quot;cooling down&quot;, and one day will reach &quot;heat death&quot;, when everything will just stop.Some sci fi tries to get round this. Asimov has a &quot;heat pump&quot; between universes (The Gods Themselves). Arthur Clarke likes putting different new space drives in his novels, but they're well within the laws of science.Unfortunately, a &quot;hyperspace&quot; jump isn't possible either, since it would violate causation rules in special relitivity, you can't have 2 events each causing the other, it's not just that things can't go faster than light.I'm a complete spoilsport, sorry.</blockquote>

[QUOTE="spiney, post: 109248, member: 192438"] Unfortunately, the laws of conservation of energy prevent any such thing, quite simply you just can't do it! This rules out Cavorite, the Dean Drive, strange gyroscope arrangements, you name it! You can't use a waterfall to turn a waterwheel, and also use that waterwheel to pump enough water back uphill to keep itself turning. That's perpetual motion, if it were true, energy would just be created from nothing, and the wheel would spin ever faster and faster ...... Unforunately, the opposite is happening, the universe is "cooling down", and one day will reach "heat death", when everything will just stop. Some sci fi tries to get round this. Asimov has a "heat pump" between universes (The Gods Themselves). Arthur Clarke likes putting different new space drives in his novels, but they're well within the laws of science. Unfortunately, a "hyperspace" jump isn't possible either, since it would violate causation rules in special relitivity, you can't have 2 events each causing the other, it's not just that things can't go faster than light. I'm a complete spoilsport, sorry. [/QUOTE]

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