"Life is too short for long-term grudges."
[Elon Musk]

Quote of the Day, from brainyquote.com (2026/07/10)

Article of the Day

Gu Yanwu

Gu Yanwu (1613–1682) was a Chinese historian, philologist, and poet. Born in Qiandun, he pursued advancement in the imperial examination system but failed to achieve the rank of juren. He was a Ming loyalist after the Qing conquest and declined political positions to travel across China. His work, Rizhilu, is an edited collection of his notes on various topics, mainly statecraft and historiography. He was critical of Neo-Confucianism, Buddhism, Daoism, and the political centralization and reliance on law codes. He advocated for historical study centered on primary sources. Rizhilu and his phonology treatise Yinxue wushu were published during his lifetime; his other surviving works were published by Pan Lei after his death. Gu's thought influenced scholars throughout the Qing period, and 19th-century scholars such as He Shaoji venerated him at a Beijing temple constructed in his honor. Revolutionaries such as Liang Qichao praised his work, stressing his empiricism and resistance to Qing rule. (Full article...)

  • Article of the Day

Image of the Day


Source: Wikimedia Commons.

On this day: July 10

July 10: Independence Day in the Bahamas (1973)

Lady Jane Grey
Lady Jane Grey

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].