There is an old adage that says there is no replacement for displacement, Well, there is one: nitrous oxide. There are those who will argue with this, but we'll bet by the time you get to the end of ...
Like many wonderful and useful scientific things, nitrous oxide was discovered by accident in 18th-century England, and much later (during the '30s and '40s) it was used by dentists as an anesthetic.
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