Videos Tagged: leonardo da vinci

History of Helicopters
youtube icon

The earliest invention for vertical flight that we know comes from China. It is known that since 400 years BC, children in China played with bamboo flying toys. Children attached a stick to a ro...

  • 3,754
  • 2 years ago
  • 8(1)
Latest Articles
According to a legend, a ruler in Ancient China invented the game of Keno, and used the money to fund the Great Wall of ...
  • 34
  • 1 day ago
The G20 is an acronym that stands for a group of 20. The G20 is a group of 19 countries plus the European Union, trying ...
  • 50
  • 3 days ago
The most common stereotype is that people believing in conspiracy theories are just some paranoid loners living in their...
  • 185
  • 1 week ago
The average life expectancy nowadays is close to 80 years on a worldwide level
  • 226
  • 2 weeks ago
An ancient form of a take-out restaurant, the thermopolium was an outdoor service counter that offered ready to eat food
  • 278
  • 3 weeks ago