Betty Reid Soskin, who used her fame as the oldest National Park Service ranger to raise awareness about often-overlooked and untold stories, has died. She was 104. Her family and the park ...
New research shows Roman concrete relied on heat-driven mixing and reactive lime, giving it a surprising self-healing ability ...
Learn how irrevocable letters of credit (ILOC) secure payments in international trade, explore their uses, types, and benefits for involved parties.
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