Here are some of the most popular messages voted for by Mrs Crabtree's expert panel of judges from the Vault of Knowledge. Of course, if you are new to Wibble Wibble, you will have missed out on part of the journey as some of you will have received more messages than others.
The Moon is a cold, rocky body about 2,160 miles in diameter. It has no light of its own but shines by sunlight reflected from its surface.
The Moon orbits the Earth once every 27.3 days.
When the Moon passes through the Earth's shadow, it is called a lunar eclipse.
The reason that the Moon appears to change colour during a lunar eclipse is that the dust in the Earth's atmosphere is acting like a light prism and refracting the light that strikes the Moon.
Lunar eclipses will not be around forever. The Moon's orbit around Earth increases by 3.8 cm per year which means that the last total lunar eclipse will occur in around 600 million years time.
Eclipses of the Moon by the Earth's shadow are actually less numerous than solar eclipses. However, each lunar eclipse is visible from over half the Earth.
The next total lunar eclipse to be seen by African and European Wibble Wibblers will be on 10 December 2011.
Well, pi is the number of times a circle's diameter fits around its circumference. Most people would say that a circle has no corners, but it is more accurate to say that it has an infinite number of corners.
The first person to use the Greek letter was Welshman William Jones in 1706. He used it as an abbreviation for the periphery of a circle with unit diameter and it quickly became a standard notation.
The circumference of every circle is about 3.1415926535897932384626433832795028841971693993751058209... times as long as the diameter.
In actuality this number is a never-ending number that has fascinated mathematicians for centuries as they strive to stretch the number out toward infinity... a number that challenges the very essence of WW philosophy - being able to know all there is to know.
Pi occurs in hundreds of equations in many sciences including those describing the DNA double helix, a rainbow, ripples spreading from where a raindrop fell into water, superstrings, general relativity, geometry problems, waves and navigation.
Because pi is known to be an irrational number it means that the digits never end or repeat in any known way. Millions of digits have been calculated, with the record held by a supercomputer at the University of Tokyo that calculated 206,158,430,000 digits.
Wibble wibble congratulates all those mathematicians involved in these complex calculations as they plan ahead for a time when the survival of humanity might depend on the ability to construct extremely large, accurate circles!
The human population has swelled so much that people alive today outnumber all those who have ever lived, says a factoid whose roots stretch back to the 1970’s.
Any statements about the number of people who have died since time began is, of course, a rough estimate, and the answer is also largely dependent upon your definition of when "time began."
Your best estimates for the number of people who have died since the pyramids were built (i.e. about 5,000 years ago) are around 6 billion, which is fairly close to Planet Earth’s current world population.
But if you consider that modern humans emerged around 40,000 to 45,000 years ago, that puts estimates about the number of dead in human history— anywhere from 12 billion to up to 110 billion.
However, most demographers peg the number of dead at approximately 60 billion, which means that there are several dead Wibble Wibbler ancestors for each of you, and you are not likely to catch up for a long, long time — if ever.
The good news is you still get to share your birthday with at least nine million other people in the world.
So, if it is your birthday today. Happy Birthday from Wibble Wibble.
The Moon
What is pi and why is it important?