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US Navy’s “Aquanauts” tested the boundaries of Deep Diving. It ended in tragedy
"Ironically, the ocean is far more accessible than the stratosphere, and yet, it's remained more of a mystery than space"
Russia’s Su-57 stealth quality test caught…on tape! (videos)
"The choice of how exactly to reduce radar cross-section of an aircraft was a balancing act for engineers"
SpaceX aims to test its Mars rocket system in first half of 2019
While Mars missions are the ultimate goal, it should also be capable of return trips to the Moon with in-space refueling
