PETER BOWATER / SCIENCE PHOTO LIBRARY PETER BOWATER / SCIENCE PHOTO LIBRARY
Egyptian pyramids. Misty dawn light bathing the pyramids at Giza, near Cairo, Egypt. These ancient monuments were built between 2600 and 2500 BC, as tombs for pharaohs of Ancient Egypt. The smallest (in the foreground) is Menkaure's Pyramid, with Khafre's Pyramid behind it. Behind both of these is the largest, Great Pyramid, which was built for Pharaoh Cheops (or Khufu), and was the first to be built. Smaller pyramids, for the queens of the Pharaohs, are at lower centre. The pyramids are constructed of millions of blocks of limestone, each weighing 2-4 tonnes. Khafre's Pyramid (143 metres) looks taller than the Great Pyramid (146 metres) because it is on a hill.
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