Morning Overview on MSN
Why do most modern ships lack sails, and which ones still use them?
Modern harbors are crowded with steel hulls and humming engines, not tall masts and canvas. The global fleet has traded wind ...
Morning Overview on MSN
Who invented the modern rocket engine?
Modern spaceflight rests on a deceptively simple idea: a machine that carries its own fuel and oxidizer, then hurls exhaust ...
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