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...)
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- 906 – Ahmad ibn Kayghalagh, an Abbasid military officer of Turkic origin, led a raid against the Byzantine Empire, taking at least 4,000 captives.
- 1727 – George II and Caroline of Ansbach were crowned king and queen of Great Britain in Westminster Abbey.
- 1877 – Scotland's worst mining accident occurred when an explosion at a colliery in Blantyre, South Lanarkshire, killed 207 miners.
- 1940 – After evading French and Spanish authorities, Belgian prime minister Hubert Pierlot (pictured) arrived in London, marking the beginning of the Belgian government in exile.
- 2001 – The controversial video game Grand Theft Auto III was first released to critical acclaim, and went on to popularise open-world and mature-content games.
- 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 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.