"Every failure is a step to success."
[William Whewell]

Quote of the Day, from brainyquote.com (2026/02/04)

Article of the Day

Rosa Parks

Rosa Parks (February 4, 1913 – October 24, 2005) was an American civil rights movement activist best known for her refusal to move from her seat on a bus in Montgomery, Alabama, in defiance of Jim Crow racial-segregation laws. When Parks was arrested in 1955, local leaders were searching for a person who would be a good legal test case against segregation. She was deemed a suitable candidate, and the Women's Political Council (WPC) organized a one-day bus boycott on the day of her trial. After Parks was found guilty of violating state law, the boycott was extended indefinitely, lasting for 381 days and finally concluding after segregation on buses was deemed unconstitutional in the court case Browder v. Gayle. Parks received many awards and honors, both throughout her life and posthumously. She received the Presidential Medal of Freedom, a Congressional Gold Medal, and was also the first Black American to be memorialized in the National Statuary Hall. (Full article...)

  • Article of the Day

Image of the Day


Source: Wikimedia Commons.

On this day: February 4

February 4: Lichun begins in East Asia (2026); World Cancer Day; National Girls and Women in Sports Day in the United States; Rosa Parks Day in some parts of the United States

London low emission zone sign
London low emission zone sign

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].