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NASA’s Perseverance rover is on the verge of changing humanity’s future. Just over a year after touching down on the red planet, Perseverance is embarking on the most demanding part of its mission to date – striking out at top speed for the sites most likely to house signs of life. To succeed, the team must overcome epic challenges and take Perseverance into uncharted territory...。A documentary showing the real science behind today's UFO phenomenon. Why are they talking about UFOs in Congress? What's behind all these videos? And most important of all: Are we being visited?。