The concrete blocks that once protected Britain
More than 100 years ago acoustic mirrors along the coast of England were built with the intention of using them to detect the sound of approaching German zeppelins. The concave concrete structures were designed to pick up sound waves from enemy aircraft, making it possible to predict their flight trajectory, giving enough time for ground forces to be alerted to defend the towns and cities of Brita
How Ethiopian prince scuppered Germany's WW1 plans
At 16 years old, Iyasu took the opportunity of the death of the regent to claim personal rule A hundred years ago, the Ethiopian prince Lij Iyasu was deposed after the Orthodox church feared he had converted to Islam. But it also scuppered Germany's plans to draw Ethiopia into World War One, writes Martin Plaut. In January 1915 a dhow slipped quietly out of the Arabian port of Al-Wajh. On board we
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