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How Were the Egyptian Pyramids Built?

14 June 2016 And so scientists have had to piece together clues as to how these towering monuments were constructed. Over the past two decades, a series of new discoveries and studies allowed researchers to paint a clearer picture of those feats. [In Photos: Inside Egypt s Great Pyramids] Giza pyramids The first, and largest, pyramid at Giza was built by the pharaoh Khufu (reign started around 2551 B.C.). His pyramid, which today stands 455 feet (138 meters) tall, is known as the Great Pyramid and was considered to be a wonder of the world by ancient writers. The pyramid of Khafre (reign started around 2520 B.C.) was only slightly smaller than Khufu s but stood on higher ground. Many scholars believe that the Sphinx monument, which lies near Khafre s pyramid, was built by Khafre, and that the face of the Sphinx was modeled after him. The third pharaoh to build a pyramid at Giza was Menkaure (reign started around 2490 B.C.), who opted for a smaller pyramid that stood 215 feet (

Scientists are finding more proof for role aerosols in Covid spread

Scientists are finding more proof for role aerosols in Covid spread Photo: DutchNews.nl Scientists at Amsterdam, Twente and Cambridge universities are finding more evidence about the role aerosols may play in the spread of coronavirus and are calling for better ventilation in homes, television show Nieuwsuur has reported. More analytical models are showing that aerosols play a role although there is no rock solid proof yet, Daniel Bonn told the programme. ‘But there are a lot of things that cannot be explained quantitatively without considering the possibility of aerosols as a vehicle for contagion,’ he said. Bonn said he was happy the World Health Organisation has now also admitted aerosols are likely to figure in the spread of coronavirus. ‘We’ve been saying this for a very long time,’ he said.

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