Bloody royal relic probably a fake

A sample of blood long thought to belong to French King Louis XVI is probably not authentic, scientists say.

An elaborately decorated gourd was thought to contain a handkerchief that had been dipped in the king's blood after he was killed by guillotine by French revolutionaries in 1793. 

But scientists have now sequenced the genome of the sample and say it is unlikely to belong to the monarch.

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