The asteroid belt is nothing but tourist traps, and the rest stops really thin out after Saturn. Some of you will want to consider flying. Luckily, at a Boeing 777's maximum velocity of 590 miles per hour, the trip to Pluto will take only about 680 years.
Yet structures like the Pantheon and the Colosseum have survived for centuries, often with little to no maintenance. Geologists, archaeologists and engineers are studying the properties of ancient Roman concrete to solve the mystery of its longevity. âRoman concrete is . . . considerably weaker than modern concretes. Itâs approximately ten times weaker,â says Renato Perucchio, a mechanical engineer at the University of Rochester in New York.
The Manufacture of Swords. By the time of the Roman Republic (c.509 44BC), the use of steel in the manufacture of swords was well advanced and Roman swordsmiths smelted iron ore and carbon in a bloomery furnace (the predecessor of the blast furnace).he Pilum. Around 2m (6.5ft) in length, the main heavy spear or javelin used by the Roman Army was the pilum. It consisted of a socketed iron shank with a triangular head. The pilum weighed in at around 3 4kg (6.6 8.8lb); later versions produced during the Empire (27BC AD476) were lighter.