It was only after the development of swifter steam-driven trains, in the early years of the 19th century, that more frequent trains and their proximity to each other created dangers of collisions. The first slow and cumbersome horse-drawn rail traffic posed few control problems not resolved by follow-the-leader principles. This Time in History In these videos, find out what happened this month (or any month!) in history.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.
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