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.
The ancient Greek military invented many revolutionary technologies, one of which is that they were the first military to use technology in the warfare and combat.For example, they invented the catapults and giant siege engines.t around the fourth century BCE, Alexander the Great (Alexander III of Macedon), invented and used the first military formations in a battle situations. That is why he was so successful and conquered many territories. Mainly he used the Phalanx formation. The phalanx was the very first tactic.