"Eighty percent of success is showing up."
[Woody Allen]

Quote of the Day, from brainyquote.com (2026/09/11)

Article of the Day

Path of American Airlines Flight 11
Path of American Airlines Flight 11

American Airlines Flight 11 was a domestic passenger flight that was hijacked by five al-Qaeda terrorists on the morning of September 11, 2001, as part of the 9/11 attacks. The airliner was deliberately crashed into the North Tower of the World Trade Center complex in New York City, killing everyone aboard the flight and resulting in the deaths of more than one thousand people. The aircraft involved, a Boeing 767 with 92 passengers and crew, was flying American Airlines' morning transcontinental service from Logan Airport to Los Angeles International Airport. The hijackers breached the cockpit, forcing the passengers and crew to the rear. Mohamed Atta took the controls and flew the plane into the North Tower from floors 93 through 99 at 08:46 local time. Seventeen minutes later, United Airlines Flight 175 crashed into the World Trade Center's South Tower, dispelling any notion that the attacks were accidental. The North Tower collapsed at 10:28, resulting in hundreds of casualties. (Full article...)

  • Article of the Day

Image of the Day


Source: Wikimedia Commons.

On this day: September 11

September 11: National Day of Catalonia

Alexander Hamilton
Alexander Hamilton

Knowledge about Earth

Facts and Figures

  • Age of Earth: ~ 4.568 billion years
  • World Population: 7.3 billion (July 2015)
  • Continents: 7 (Asia, Africa, North America, South America, Antarctica, Europe, and Australia)
  • Mean Radius: 6371.0 km
  • Axial Tilt: 23,44°

Image Source: Wikipedia - License: Public Domain (thanks to NASA)

Our Solar System

Our solar system consists of
1 star (Sun) and 8 planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune).

  • 1 AU (astronomical unit) is roughly the distance between Earth and the Sun (about 150 million kilometres).
  • The space probe Voyager 1 was launched by the NASA in 1977 and is meanwhile (autumn 2015) about 133 AU away from Earth.

Image Source: Wikipedia - License: CC BY-SA 3.0

Why you should extend your general knowledge:

There are many reasons why one should or wants to extend his knowledge.
First you should consider that "general knowledge" is knowledge which a group of humans - who belong together regional, temporal or otherwise - owns. Thus, it describes a basic understanding of specific categories of knowledge.

As the English philosopher Francis Bacon said before: "Wisdom is Power" [Bacon 1597].