Case file · High strangeness
Silvery dew on the Forum of Augustus
The historian Cassius Dio, a senator in Rome, says that in AD 196 a fine silvery rain fell from a clear sky onto the Forum of Augustus; he used it to coat bronze coins, which kept the silver look for three days.
196 CE · 41.89, 12.49 · status: account
The sceptical view
An eyewitness account by a careful historian, but it has no clear natural match; some suggest pollen, dust or mercury-like deposits.