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Wi-Fi signals struggle through walls not because concrete is thick, but because water in the plaster absorbs 2.4 GHz almost exactly the frequency a microwave oven uses to heat your dinner
Voyager 1 is now more than 25 billion kilometres from Earth, and its transmitter runs on about 22 watts — less than the bulb in a fridge — yet NASA's Deep Space Network still hears it whisper across nearly 24 hours of one-way light travel
How did a rubber gasket the size of a dinner plate, stiffened overnight in a Florida cold snap, rewrite the way NASA engineers are allowed to disagree with management?
A QR code's three corner squares aren't decoration — they're position markers that let a scanner work out the code's orientation in under a millisecond, even when you photograph it upside down or at 45 degrees
