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Published in : 2015-05-10 | by Documentary History HD
The Space Transportation System (STS) was a proposed system of reusable manned space vehicles envisioned by NASA in 1969 to support extended ...
Published in : 2015-05-11 | by Documentary History HD
Dinosaurs are a diverse group of animals of the clade Dinosauria. They first appeared during the Triassic period, 231.4 million years ago, and were the ...