The Big Mac is a hamburger sold by McDonald's, an international fast food restaurant chain. It was introduced in the metropolitan area of Pittsburgh, United States, in 1967 and nationwide in 1968. It is one of the company's signature products.

https://en.wikipedia.org/wiki/Big_Mac

"There are all kinds of interesting questions that come from a knowledge of science, which only adds to the excitement and mystery and awe of a flower."
Richard Feynman
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