Thord D. Hedengren
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space
The number of contactable alien civilizations: 36
2020-07-21
Magic glass
2015-07-27
The first object 3D printed in space
2014-11-26
Rosetta and Philae
2014-11-19
Probing a comet
2014-11-12
The details of colonizing space
2014-11-03
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