"As a well-spent day brings happy sleep, so a life well spent brings happy death."
[Leonardo da Vinci]

Quote of the Day, from brainyquote.com (2026/08/14)

Article of the Day

European rabbit

The European rabbit (Oryctolagus cuniculus) is a species of rabbit native to the Iberian Peninsula and southwestern France. It is the sole living member of the genus Oryctolagus and has two subspecies. The European rabbit eats plants and lives in grasslands, and is highly adaptable to different environments, making its distinctive burrows known as warrens to live underground. It is the only species of rabbit to be domesticated, and the many breeds of European rabbit vary widely in size and shape, though the typical European rabbit has brown, grey or black fur with white undersides and is smaller than a European hare or mountain hare. In the European rabbit's mating system, dominant males have multiple female mates, though monogamous relationships are common in groups with fewer females. European rabbits have been introduced to every continent except for Antarctica, but are facing population declines in their native range due to overhunting, habitat destruction, and disease. (Full article...)

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Image of the Day


Source: Wikimedia Commons.

On this day: August 14

August 14: Arba'in (Shia Islam), Independence Day in Pakistan (1947)

Kenji Hatanaka
Kenji Hatanaka

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].