"If the world seems cold to you, kindle fires to warm it."
[Lucy Larcom]

Quote of the Day, from brainyquote.com (2019/10/22)

Article of the Day

The megabat family, Pteropodidae, includes the largest bat species, some weighing up to 1.45 kg (3.2 lb) with wingspans up to 1.7 m (5.6 ft), as well as smaller species, some less than 50 g (1.8 oz). They are found in tropical and subtropical areas of Eurasia, Africa, and Oceania. Unlike other bats, they have dog-like faces and clawed second digits. Well-adapted for flight, megabats have sustainable heart rates of more than 700 beats per minute and large lungs. Most of them are active at night. They roost in trees or caves, sometimes in colonies of up to a million individuals. Most are unable to echolocate, relying instead on their keen senses of sight and smell to navigate and locate food, usually fruits or nectar. A quarter of all megabat species are listed as threatened, due mainly to habitat destruction and overhunting. Even though they can transmit a variety of dangerous viruses, they are a popular food source for humans in some areas. (Full article...)

  • Article of the Day

Image of the Day

Doorgang in muur. Locatie, Chinese tuin Het Verborgen Rijk van Ming. Locatie. Hortus Haren 01.jpg
Source: Wikimedia Commons.

On this day: October 22

October 22: International Stuttering Awareness Day

Hubert Pierlot
Hubert Pierlot

Johann Reinhold Forster (b. 1729) · Charles Scott (d. 1813) · Hannah Mitchell (d. 1956)

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].