视频简介
In 2010 David Crowley, an Iraq veteran, aspiring filmmaker and charismatic up-and-coming voice in fringe politics, began production on his film 'Gray State.' Set in a dystopian near-future where civil liberties are trampled by an unrestrained federal government, the film's crowd funded trailer was enthusiastically received by the burgeoning online community of libertarians, Tea...。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...。