Une abonnée nous signale:
Got privacy? You may think you do, but a recent experiment by a Russian photographer suggests otherwise. Un article de katherine Noyes, PCWorld
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Écouter l’ennemi: Les grandes oreilles sur les côtes britanniques dans les années 20.
Un article du Spiegel The enormous concrete shells are as tall as a house, and they were designed to listen for enemy aircraft in the 1920s and 30s. Pre-World War II acoustic experiments led to some extraordinary architecture — and to a remarkably effective technology which ultimately succumbed to the invention of radar.