The term gyrocopter , also known as autogyro, originated in Spain. It is a type of rotorcraft , between fixed-wing aircraft and ...

Napa is a region north of the San Francisco Bay Area in California, USA. The Napa Valley, 60 miles northeast of San Francisco, is...

This is the first time I have seen the longest concert in history. The concert lasted for more than 3 hours, with a total of 44 songs,...