The 125th meridian east is a line of longitude that is 125 degrees east of the Prime Meridian, which is located at 0 degrees longitude. This meridian runs from the North Pole to the South Pole, passing through several countries and regions. In terms of geography, the 125th meridian east passes through: - **Russia**: It enters Russia in Siberia. - **Mongolia**: It crosses through the western part of the country.
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