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In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai
Daniel Burnham’s Flatiron Building (1902) was one of the first to use steel girders to hold up the b
On March 25, 1911, as scores of young factory girls leaped to their deaths from the eighth, ninth, a
Increased acidity inhibits the growth of coral and other carbonate shell-building organisms
Structure of a Fatty Acid Fatty acids are the building blocks of some lipids
Andean-Type Mountain Building