Post-socialist cities like Sofia in Bulgaria, aren't known for their architectural diversity. They tend to be a bit monotonous. And rusty. Very rusty. SEE ALSO: This city has no monuments to women so ...

North Korea launched a close-range ballistic missile and other weapons toward the sea on Tuesday, South Korea’s military said ...

Since their discovery in the 1950s, metallocenes—chemical compounds where a metal atom sits "sandwiched" between two carbon rings—have been at the heart of organometallic chemistry research, finding ...