The Archaeological Gems That Make the National Museum of Anthropology Unique
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The Archaeological Gems That Make the National Museum of Anthropology Unique
The National Museum of Anthropology and History was inaugurated in 1964 and is now considered one of the world's most important museums dedicated to indigenous cultures. Its 22 permanent galleries house Mexico's most important archaeological and ethnographic collections. Speaking of archaeological pieces, the museum has 7,761 pieces on display, representing some of the masterpieces of pre-Hispanic Mexico.
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Not all lab grown sapphires are the same
One of the most important technological breakthroughs in human history happened because a chemist reached for the wrong inkwell. In 1915, a metallurgist named Jan Czochralski was working in his lab. He was writing notes, and without looking, he reached over to dip his pen into his ink. Instead, he accidentally dipped his pen nib into a small crucible of molten tin sitting on his desk. When he pulled the pen out, he didn't get a messy blob of metal. He drew out a perfectly continuous thread of solid tin. He immediately realised what had happened. By dipping a solid point into a liquid melt and drawing it upwards at the exact right speed, the molten metal would freeze and crystallise perfectly onto the tip. He didn't invent this to make synthetic gemstones. He just wanted to study how metals crystallise. But decades later, scientists realised this exact "pulling" method was the only way to grow the flawless silicon crystals required to build microchips. Today, every smartphone, computer, and high-end lab-grown sapphire exists because a chemist in 1915 wasn't looking at his desk.
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