Yogurt stands in for mayonnaise, and veggies such as celery, onions or bell peppers add a bit of crunch. One serving of egg salad made with two egg whites, 1/2 ounce of plain, fat-free yogurt and 1/4 stalk of celery has 60 calories, less than 1 gram of carbohydrates and 0.5 grams of fat.
The Amazing Inventions of Heron of Alexandria. Heron, also known as Heron of Alexandria, developed many machines and mechanical devices with practical uses, showing that it was possible to take theory and put it into practice. Some of his devices were: 1  A coin operated 'Holy Water Dispenser'. 2  A water organ. 3  The Aeolipile, a steam-powered device.
Obelisk making technology in ancient Egypt is an archaeological matter that is not entirely understood today. Ancient Egyptian Obelisks are tapering stone pillars which have a square cross-section, were used for ornamental purposes in temples and had religious or socio-political connotations.They were generally made from granite coming from well-known quarries located near the banks of the Nile, mainly in the region of Aswan.ncient Egyptian Obelisks are tapering stone pillars which have a square cross-section, were used for ornamental purposes in temples and had religious or socio-political connotations. They were generally made from granite coming from well-known quarries located near the banks of the Nile, mainly in the region of Aswan.