Eleanor Roosevelt thanks a chemical engineering firm in Philadelphia for manufacturing water for the king and queen of England on their visit to America.
This video highlights a collection of letters from Eleanor Roosevelt to a chemical engineering firm in Philadelphia—thanking them for manufacturing water for a visit from the king and queen of England.
A twist of fate thrusts a protégé into the limelight of the Nobel Prize.
Can sustainable air travel get off the ground?
The post-World War II mining rush that transformed a region.
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