The European Space Agency has developed the Invictus, a new Mach 5 glider. It takes off horizontaly
like a plane, but performs like a jet and can be re-used. The secret lies in refrigiration of the
air on which it runs with hydrogen:
Invictus : le démonstrateur hypersonique de l'Europe qui pourrait rebattre les cartes de l'accès à l’espace
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