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Jann Poppinga

Apparently, this user prefers to keep an air of mystery about them.

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  • Bremen, Germany
  • materialise.com
  • Member for 1 year, 1 month
  • 16 profile views
  • Last seen Feb 24 at 13:02

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25 How could a subterranean alien lifeform develop space travel? Oct 21 '20
18 Martians want to keep their weeks roughly in sync with Earth. How would they do that? Oct 14 '20
5 Tongue Keyboard Jan 20 '20
4 Does this time travel delivery service cause paradoxes, and if so how can I avoid them? Oct 21 '20
3 Plausibility of Materials Lasting Millions of Years Sep 22 '20
2 Plausible explanations as to why an advanced sci-fi species can't reproduce? Jan 20 '20
1 Can People Fool Benevolent Brother's 'Alibi Trackers' and Escape? Oct 14 '20
0 For people on earth, is it possible to harvest energy by decelerating the planet rotation? Jan 28
0 What would be the best city in the U.S./Canada to live in for a supernatural being trying to exist undetected from humanity? Jan 18
0 Complete graph (DAG) of prerequisite relationships of human technology Oct 13 '20
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