The mystery of how the Pyramids of Giza in Egypt were built continues to elude scholars, even in the 21 st century. As famed Egyptologist Flinders Petrie records in his The Pyramids and Temples of ...

Hair protects your skin and can renew itself without scarring. A hair has a follicle below the skin, made of live cells, and a shaft above the skin made of dead cells. Hair grows through three phases: ...