Ukraine is one of only two countries in the "do not travel" advisory, but travellers to the likes of Sweden and Spain are told to "exercise increased caution." ...

The 24 hour Surface Analysis map shows current weather conditions ... model for frontal analysis began in the late 1910s across Europe, with its use finally spreading to the United States during ...

World War I involved 32 nations from 1914 to 1919. It redrew the world map and reshaped many borders in Europe. The collapse of the Russian Empire created Poland, the Baltics, and Finland.