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Nanotechnology in Ancient Times

“According to a 2000-year-old recipe for hair dye, the ancient Greeks and Romans were harnessing a scientific force that they had no idea even existed – they were using nanotechnology on their very own heads.
The Greeks and Romans used hair dye with some measure of frequency, most often for the purpose of dying their gray hair to black. Their dry mixture contained ingredients such as slaked lime and lead oxide, which – when exposed to human hair for approximately 3 days – causes nanocrystals made from lead sulfide to form inside the shaft of hair.
This reaction is caused when sulfur from the amino acids that are naturally present in hair keratins mix with the lead in lead oxide – initially, this is what causes the hair to turn black, but it apparently also causes lead sulfide nanocrystals that are highly similar to those found in modern, advanced scientific processes!
In simpler terms, the chemical compound that forms inside of the human hair is what colors the hair without damaging it – and the process by which the hair is dyed black is very similar to modern nanotechnology. Fortunately for the Greeks and Romans, this kind of lead-based hair dye is safe for human use, since the compound typically has trouble penetrating the skin.
Interestingly enough, the chemical engineering that came from this dye process – where the tiny crystal structures line up to form ‘quantum dots‘ – is something that scientists have admitted is a “current challenge in nanotechnology”, and is actually a process that researchers are currently trying to figure out how to develop on their own.”

LINK

quantum dots picture

These substances were colored by quantum dots in a modern laboratory. The principle at work is related to that used in ancient hair dye

Egypt Joins China Club

“President Mohammed Morsi’s historic trip to Beijing signifies a new direction for Egyptian foreign policy. The Muslim Brotherhood leader has sent a clear message by selecting China for his first state visit outside the Middle East. By forging closer ties with China, Morsi is warning the US government not to take Egyptian acquiescence for granted.”
LINK

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