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Shanghai to San Francisco in Under Two Hours? Don't Hold Your Breath

Chinese scientists say super-fast submarine technology could achieve torpedo speeds for passengers. File this one under fascinating but unlikely. 
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“It’s such a smooth ride, you can sit there and drink your coffee going through six-foot swells." 

That's how one person recently described a trip on a newly patented stealth watercraft, Ghost. Ghost is a supercavitating boat—possibly the first in the world—which means it funnels a stream of air around its underwater propellers, enclosing them in a bubble. This drastically reduces drag, allowing the boat to achieve super-fast speeds.