The propeller paper craft published by NASA can be downloaded in PDF format from here. Print on A4 size paper, prepare scissors, and you're ready to go. First, cut out the rectangle along the dashed ...
Update for 3 p.m. ET: NASA has delayed the first flight of the Ingenuity helicopter on Mars until no earlier than Wednesday (April 14) after a final preflight test ended early. NASA is preparing to ...
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