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8 Nov 2009
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Fact of the day
Nostradamus wrote 942 quatrains (4 line long poems) in his lifetime which he organised into centuries. Many people believe that he could predict the future and that these poems contain cryptic information about future events.
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The Great Wall of China, which is over 2,500 miles, took over 1,700 years to build.
Hair consists mainly of keratin, which is also responsible for the elasticity of fingernails. A single hair has a thickness of 0.02-0.04mm, so that 20-50 hair fibers next to each other make one millimeter. Hair is as strong as a wire of iron.
There is clear geological evidence that there has been water on Mars.
It takes 11.2 kilometres per second to escape from the Earth.
Cranberries are sorted for ripeness by bouncing them; a fully ripened cranberry can be dribbled like a basketball.
 
 

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Humans
Bones, cardiovascular systems, muscle tissue and organs all change in zero-g, and the longer an astronaut stays aloft, the more marked the changes that take place.
Earth
The aurora borealis ("Northern Lights") is caused by the Earth’s magnetic field and its interaction with ionized particles.
Machines
The Black Box flight recorder was first invented in 1958 at the Aeronautical Research Laboratories, Melbourne, Australia. It is an orange colour.
Nature
The antlers of a moose are created from living tissue supplied by blood through a network of vessels covered with a soft smooth skin called velvet. Eventually the tissue becomes solidified, the velvet is scraped off, and the antlers become completely formed of dead matter.
Mysteries
In the 1970s, Peter Sturrock sent questionnaires to 2,611 members of the American Astronomical Society. Replies were received from 79 percent of the members (2062). Of these 62 respondents had either personally observed a UFO or had detailed knowledge of a sighting.
Origins
The smallest dinosaurs were just slightly larger than a chicken. Compsognathus is one of the smallest and was about 1 m (3 feet) long and weighed about 2.5 kg.
Big Theories
Skydivers reach a terminal velocity of about 120 miles per hour (190 km/hr) if they spread eagle themselves to maximise their air resistance, but a velocity of 150 mph (240 km/hr) if they assume a head-down position like a high-board diver about to enter the water.
Technology
The song, 'I am the Walrus', by John Lennon was inspired by a police two-tone siren.
Space
There are stars as much as 400,000 brighter than the sun and others as much as 400,000 time fainter if they could all be seen at the same distance.
 
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