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POPSIn Search of Wisdom: What is the Root Cause of Inequality? When there is nothing quantifiable to possess, we would neither know what the share of each individual is nor think of equality; if there was no notion of equality, we would not care that some have more than the others. Fortunately or unfortunately, there is always something to be possessed and our mind is naturally keen on the subject of equality
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POPSFree-piston engine could be twice as fuel efficient as combustion engines In conventional internal combustion engines, multiple pistons are connected via rods to a crankshaft that, via the transmission, drives the wheels. Free-piston engines do away with the crankshaft: the pistons aren't connected to anything. Instead, two opposing pistons just shuttle back and forth inside a chamber. To generate electricity, the pistons could be equipped with rows of magnets that shuttle past metal coils to create an electrical current.
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