The driest place on the planet is in Antarctica. There are places, which has not seen any rain for the last 2 million years. One such place is called the Dry Valley, which in addition is free of ice and snow, making it the driest place on Earth. The Sahara desert, on comparison, gets an average of 25mm of rain annually.
2010/04/25
2010/04/13
No.0005 - Telephone
MYTH: Alexander Bell invented the telephone.
True Story: It was an Italian-born inventor Antonio Meucci, who first designed a working machine which transmits a vocal sound through a wire. Meucci arrived in the USA in 1850 and he first demonstrated his machine in 1860, which he called teletrofono. He filed a patent caveat, a kind of provisional patent, in 1871. However he failed to renew his patent caveat in 1874 and Bell's patent was accepted in 1876.
NUMBER: 90%
90% of household dust is made up of human dead skin cells. We shed around 40kg of skin in our lifetime.
UPDATE on 2010.05.12: I am sorry, in pursuit of busting a myth, I have written a myth. The main source of the household dust is not dead skin cells. It depends largely on the season, lifestyle, outside environment and whether window is opened a lot or not etc. Dead skin cells make up only tiny part of household dust, the most of it comes from dirt and girt, which maybe many people's instinct anyway.
True Story: It was an Italian-born inventor Antonio Meucci, who first designed a working machine which transmits a vocal sound through a wire. Meucci arrived in the USA in 1850 and he first demonstrated his machine in 1860, which he called teletrofono. He filed a patent caveat, a kind of provisional patent, in 1871. However he failed to renew his patent caveat in 1874 and Bell's patent was accepted in 1876.
NUMBER: 90%
90% of household dust is made up of human dead skin cells. We shed around 40kg of skin in our lifetime.
UPDATE on 2010.05.12: I am sorry, in pursuit of busting a myth, I have written a myth. The main source of the household dust is not dead skin cells. It depends largely on the season, lifestyle, outside environment and whether window is opened a lot or not etc. Dead skin cells make up only tiny part of household dust, the most of it comes from dirt and girt, which maybe many people's instinct anyway.
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