Knowledge of concrete construction was lost about the same time Rome stopped being the capital of the empire. It wasn't until 1903 that it was used once again. My opinion is that the outside blocks were quarried and the vast majority of the inside was poured.
Yes, and terrestrial animals do the same thing. The statement that "It is more efficient for marine animals to swim in straight lines ..." is so wrong that I am amazed a scientist uttered.
Yes, of course. At one time, it was possible to enter "Who owns Neatorama.com" in a search engine and get good results. Now, one only gets this article.
Signed up for a VPN service. Allows five devices on one account. Now it is dunning me to change the password just to make sure I did not share it with anyone. They also "update" the software on mobile devices and require a re-login each time.