historical mystery

7 historical mysteries seem to be impossible to solve forever, finally have the answer
History leaves behind many mysteries that seem impossible to decipher. But thanks to the appearance of science and technology, everything became easier.
'The man with the iron mask' - the mystery of mankind over the past 350 years
Who is that mysterious iron mask man - is the question that scientists have been searching for years.
The mystery of the bottomless pit swallowed everything hidden for more than 200 years
The mysteries of history have always been a headache for scientists as they try to find solutions to these mysterious stories.