Depositphotos_133296534_l-2015-1024x614 Push the envelope and test yourself

Grammarist.com says: To push the envelope means to extend the boundary of what is possible, to take a risk by going farther than others think is acceptable. The term push the envelope was popularized in the early 1980s, following the publication of the book The Right Stuff by Tom Wolfe. The book The Right Stuff chronicled American pilots who tested high-speed aircraft,…

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