Science
A Letter Sealed for Centuries Has Been Read—Without Even Opening It – The Wall Street Journal
‘Virtual unfolding’ technique used to read a letterlocked 17th century missive could also be used in healthcare and engineering

Using computer algorithms and an X-ray scanner designed for dental research, an international team of researchers has unlocked the secrets of a tightly folded letter sealed since 1697without opening it.
The virtual unfolding of the letterthe culmination of a four-year project described in a paper published Tuesday in the journal Nature Communicationspoints to a new line of historical research into the centuries-old practice of letterlocking. Thats the term used to describe the use of origami-like…
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