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6
votes
1answer
124 views

How long did it take to build earth dikes with low-tech tools?

Let's say you're in charge of a group of laborers anywhere from the Iron Age to the Middle Ages. Your job is to build a dike made of earth, a couple of meters high and presumably about the same width ...
2
votes
0answers
92 views

How close did the French come to digging a canal across the Isthmus of Kra in the 1880s?

Ferdinand de Lesseps is known to history as the man who pushed through the construction of the Suez Canal in the 1860s. Later (from 1880 onward) he led an attempt to dig a canal through Panama, but ...
5
votes
3answers
3k views

Are steam engines still in regular use anywhere in the world?

Are there any countries in which steam engines have a regular purpose, or are still dominant on the railway? When did they officially fade out of use in the western world? In Australia at least, they ...
2
votes
1answer
128 views

What is the history of Research and Development laboratories?

When did Research and Development laboratories (R&D labs) emerge? What was the institutional and intellectual context? Have they undergone major changes in their nature? What role have R&D ...