A landmark discovery on an ancient branch of the River Nile may have solved the mystery of how the pyramids in Egypt were built centuries ago. The now dried-out waterway, which once ran through Giza might have been used to transport the materials that were used to construct the pyramids. The proximity to the waterway might also suggest why there is such a cluster of pyramids in that particular area of Cairo, as the large amount of water would have been able to support the various building blocks needed for the colossal structures. The discovery was made by Dr Eman Ghoneim who used radar satellite data from space to study the Nile Valley which showed an "invisible world of information beneath the surface." Ghoneim presented her research to the 13th Congress of Egyptologists earlier this year. Speaking to IFLScience Ghoneim said: "The length probably was really, really long, but also the width of this branch in some areas was huge. We're talking about half a kilometer or more in terms of width, which is something that is equivalent to today's Nile course width. So it wasn't a small branch. It was a major branch.” The defunct waterway has been dubbed the Ahramat Branch and ran from Giza to Faiyum and amazingly passed through 38 different pyramid sites. However, without confirmation of whether the river was active during the Old and Middle Kingdoms, around 4,700 years ago, cannot fully determine if water was used to help build the pyramids. One indication that it could have been used is that according to Ghoneim these pyramids were "located exactly at the bank of the branch that we found" which could mean that they were "valley temples" which acted like ancient ports. The research might not just unlock the secrets of the pyramids but it could also uncover parts of ancient Egypt that have long been lost as towns disappeared when the Nile naturally migrated. Ghoneim added: "As branches disappeared, Ancient Egyptian cities and towns also silted up and disappeared, and we have no clue actually where to find them." Sign up to our new free Indy100 weekly newsletter Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

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Ordering supermarket groceries via a delivery app such as Deliveroo, Just Eat or Uber Eats could cost twice the price of buying directly from the same store, according to Which? Meanwhile, Amazon is charging up to 45% more for Morrisons products than if they were bought from the supermarket’s own website, the consumer group found. Which? acknowledged that ordering groceries from Deliveroo, Just Eat or Uber Eats is “undeniably convenient” and could be received in as little as 30 minutes, but warned it found “shocking” price differences across a range of products in its snapshot investigation. It compared the price of a basket of 15 popular grocery items at five major supermarkets against the cost of ordering the same basket from the same supermarket to the same postcode via a delivery app, not including delivery fees. Almost all of the items were either more expensive on the delivery apps or the same price. Ordering groceries from Deliveroo, Just Eat or Uber Eats is undeniably appealing but the cost of this convenience could be double what you'd pay if you cut out the middleman Ele Clark, Which? Which? also found that customers would pay on average 8% more for Morrisons groceries via Amazon than by ordering directly from the supermarket. In one case, a 250g pack of Country Life unsalted butter cost 45% more on Amazon. The rapid delivery apps also charged a premium of as much as 106% in one instance. The Which? basket, which included branded goods such as Doritos crisps alongside own-label milk and ready meals, would have cost £36.63 from Iceland, but getting the same items delivered from the same Iceland store by Just Eat would have cost £50.50, not including delivery fees – a 38% premium. In some individual price differences, own-brand Fairtrade bananas cost 85p at Sainsbury’s and £1.75 on the three apps, Warburtons Toastie Thick Sliced White Bread cost £1 on Iceland’s website but £2 on Just Eat and Uber Eats, while Hovis Best of Both Medium Bread cost £1.19 on the Morrisons website but £2.05 from Uber Eats. Other examples included Asda own-brand Pinot Grigio costing £7 on the supermarket’s website and £9.10 on all three apps. Which? retail spokeswoman Ele Clark said: “Ordering groceries from Deliveroo, Just Eat or Uber Eats is undeniably appealing but the cost of this convenience could be double what you’d pay if you cut out the middleman. “As well as the extra cost on your groceries, you’ll probably have a delivery fee too, so it’s worth weighing this up before ordering anything to your door.” Customers who choose to order groceries via apps like ours do so because of the convenience, speed and choice on offer from rapid delivery Uber Eats A Deliveroo spokeswoman said: “The prices for grocery items available on the Deliveroo platform are set by our grocery partners. “Deliveroo always seeks to deliver great choice, availability and value for money to our customers, and we have agreed price-matching with our grocery partners including Morrisons, Co-op, Asda and more across hundreds of items.” An Uber Eats spokeswoman said: “Everyone who partners with Uber Eats sets their own prices and we always encourage them to match the prices offered in-store. “Customers who choose to order groceries via apps like ours do so because of the convenience, speed and choice on offer from rapid delivery.” A Just Eat spokeswoman said: “At Just Eat, we want all of our customers to have a positive experience when ordering from our platform. We work with more than 75,000 partners across the UK, giving our millions of customers access to choice and convenience through a variety of local takeaway options, restaurant brands and grocery stores. “As independent businesses, any restaurant or grocer using Just Eat are in control of their menus and set the prices they charge. We continue to work closely with our partners to bring value to our customers.” Amazon said that all prices of products sold through the ‘Morrisons on Amazon’ service were set by Morrisons, and added that being able to shop for Morrisons groceries on Amazon offered customers fast delivery options and value. Read More Charity boss speaks out over ‘traumatic’ encounter with royal aide Ukraine war’s heaviest fight rages in east - follow live Therapist develops secret app to help abuse victims Artificial intelligence warning over human extinction labelled ‘publicity stunt’ ‘I feel lost’ – AI pioneer speaks out as experts warn it could wipe out humanity

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