Population Pyramid | Definition, Stages & Examples
3:35
Study.comYolanda Williams
Population Pyramid | Definition, Stages & Examples
Read about the population pyramid definition, its shapes, and examples. Learn about the types of population pyramids and different population pyramid stages.
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What if the pyramids weren't built with stones at all? What if they were poured? In 1979, scientist Joseph Davidovits proposed something radical. The Egyptians didn't carve these blocks. They cast them. Like concrete. For decades, Egyptologists dismissed him. Then the evidence started piling up. Air bubbles. Trapped inside the stones. Quarried rock doesn't have air bubbles. Poured mixture does. Human hair and fibers. Found embedded inside the blocks. Not on the surface. Inside. Chemical analysis
1:02
What if the pyramids weren't built with stones at all? What if they were poured? In 1979, scientist Joseph Davidovits proposed something radical. The Egyptians didn't carve these blocks. They cast them. Like concrete. For decades, Egyptologists dismissed him. Then the evidence started piling up. Air bubbles. Trapped inside the stones. Quarried rock doesn't have air bubbles. Poured mixture does. Human hair and fibers. Found embedded inside the blocks. Not on the surface. Inside. Chemical analysis
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