For decades, shortwave radio enthusiasts have been stumbling upon mysterious stations that broadcast a looping noise, such as a nursery rhyme, occasionally punctuated by someone reading a string of numbers. The most popular theory is that these are coded messages—and now, an online shortwave radio lets you listen in.
io9 · Mark Strauss
Physics students at the University of Leicester claim to have calculated the amount of energy required to transform water into…
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