Was Roman concrete better?
In this video, Practical Engineering discusses a few modern techniques that help improve design life of concrete, including roller compacted concrete (RCC) and water reducing admixtures (superplasticizers).
Tagged: civilization
The fall of the Aztec Empire explained
Second episode in their series on the Pre-Columbian civilizations in America. This time, Kings and Generals will talk about the fall of the Aztec Empire and its capital Tenochtitlan at the hands of the Spanish...
A day in the life of a Roman soldier
The year is 15 CE, and the Roman Empire is prospering. Most of the credit will go to the emperor, but this success wouldn’t have been possible without loyal soldiers like Servius Felix. Robert...
Mysterious skeleton shows molecular complexity of bone diseases
A bizarre human skeleton, once rumored to have extraterrestrial origins, has gotten a rather comprehensive genomic work-up, the results of which are now in, researchers from the Stanford University School of Medicine report. The findings stamp...
The rise and fall of the Inca empire
It was the western hemisphere’s largest empire ever, with a population of nearly 10 million subjects. Yet within 100 years of its rise in the fifteenth century, the Inca Empire would be no more....
Impact of extraterrestrial contact
Scientific literature and science fiction put forward various models of the ways in which extraterrestrial and human civilizations might interact. Their predictions range widely, from sophisticated civilizations that could advance human civilization in many...
