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Lost 56-Year-Old Satellite’s Orbit Was Moved By Mysterious Forces—And It’s Raising Major Questions
In a world where space debris is becoming an increasing concern, one particular satellite stands out due to its unusual and unexplained movement. Skynet-1A, launched in 1969 as a military ...
Founded in 1920, the National Council of Teachers of Mathematics (NCTM) is the world's largest mathematics education organization throughout the United States and Canada.
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