* Astronomy

13th century Mongolian wreckage discovered off Japanese seabed

The vessel is the first of its kind to have been discovered relatively intact and dates from a series of attempts by Kublai Khan, emperor of the Yuan Dynasty, to subjugate Japan between 1274 and 1281.
Researchers have previously only been able to recover anchor stones and cannonballs from the scattered wrecks of the Mongol fleets and they believe that this latest find will shed new light on the maritime technology of the day.
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