![NASA's 50 Years of Mars Exploration [Video]](https://blogs.scientificamerican.com/blogs/cache/file/25E79892-D832-4B5B-B723D390B47D661F.jpg)
Humans have been visiting and exploring Mars for more than half a century, and NASA has released a video celebrating the agency'sremarkable contributions --
Humans have been visiting and exploring Mars for more than half a century, and NASA has released a video celebrating the agency'sremarkable contributions --
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