Liberal Warsaw Mayor Rafal Trzaskowski and a conservative historian, Karol Nawrocki, emerged as the front-runners in Poland’s ...

Liberal Warsaw Mayor Rafal Trzaskowski and a conservative historian, Karol Nawrocki, emerged as the front-runners in Poland's ...

There’s a long way to go yet in Poland’s presidential election — but Sunday’s first round was a good day for candidates on ...

Centrist Warsaw Mayor Rafal Trzaskowski and nationalist Karol Nawrocki will compete in a second round of the presidential ...

Mega-cities continue to increase as Earth's population grows. The largest city in the world is Tokyo, Japan, which has nearly 40 million people packed into one mega-city ...