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Alvin, the iconic research submersible, plunges deeper than ever
![<em>Alvin</em>, the iconic research submersible, plunges deeper than ever 1 Newsdaily1](http://i0.wp.com/en.newsdailyarabic.com/wp-content/uploads/2022/05/Newsdaily1.png?resize=512%2C470&ssl=1)
After $50 million upgrade, U.S. sub can reach 99% of the ocean floorAfter $50 million upgrade, U.S. sub can reach 99% of the ocean floor Read More
After $50 million upgrade, U.S. sub can reach 99% of the ocean floorAfter $50 million upgrade, U.S. sub can reach 99% of the ocean floor Read More