Barnacle-covered 300-year-old pocket watch revealed

Via Nature comes this amazing video of an x-ray trip through a barnacle-encrusted lump from a 17th century shipwreck. It reveals the workings of a very sophisticated, gorgeous watchwork mechanism inside. The researchers (from National Museums Scotland in Edinburgh) who used this x-ray technology are excited about the prospects of using it on future, similarly encrusted underwater finds.

What makes a 300-year-old pocket watch tick?