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Ce-i drept, cuburile au putut fi atinse doar pe margini, însă trebuie să ţinem cont că în interior ele erau topite.
Uimitorul material este necesar deoarece atunci când reintră în atmosferă, în momentul în care moleculele de aer se întâlnesc cu scutul extern al navetei spaţiale, aceasta se încălzeşte până la 1650 de grade Celsius.
Sursa: Business Insider
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