ESA (European Space Agency) astronaut and Expedition 66 Flight Engineer Matthias Maurer explores how concrete hardens with the lack of gravity to inform future space construction techniques on lunar and planetary surfaces. Maurer conducts research operations in the portable glovebag with a variety of cement mixtures observing how pores, bubbles and crystals develop as the samples harden.

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Photo credit: © NASA/piemags / Alamy / Afripics
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