According to Guinness World Records, which seems a good authority, the solution is the Achaemenid Empire in 480 B.C. Also referred to as the Persia,… Read More »What Was The Largest Empire In World’s History ?
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The Kola Superdeep Borehole was the Soviet Union’s plan to explore the depths of the crust within the 1970. It followed a decade of other… Read More »Deepest Borehole Ever Dug By Man Is Over 7.5 Miles Deep