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Why did this river turn into a stream of blood? - What On Earth

A river appears to run red with blood

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Practically overnight, a Siberian river turned blood red! Is this the work of an ancient curse, or something more modern? Hundreds of satellites orbit Earth and capture the world like it’s never been seen before, revealing phenomena that defy explanation. 'What On Earth' explores these unusual images as scientists attempt to explain mysteries seen from space.