Inventions that changed the world: Mikhail Kalashnikov's AK-47

It's the most effective killing machine in human history - a gun that, on its 62nd birthday, is still killing as many as a quarter of a million people every year, in every corner of the globe. Invented by a gifted tank mechanic to save Russia's motherland from the invading German hordes in WW2, the AK-47 went on to rise to global prominence during the proxy battles of the Cold War. Even today, a poorly trained militia group can become a force to be reckoned with once it finds a supply of AK-47s - such is its simplicity, reliability, affordability and sheer killing power. Abhorrent - yes, but with reference to its impact on humanity it is, sadly, among the greatest inventions of the 20th century. We take a look at this amazing weapon's history, its significance and its brutal dominance of world politics. Listen to the Podcast or

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