Wiktor Toporek's Profile > Wiktor's Groups

Polska / Poland
6079 members — last activity 6 hours, 2 min ago
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Hard SF
1185 members — last activity Jan 23, 2026 11:14AM
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Science Book Club
342 members — last activity Apr 18, 2021 09:25AM
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Science and Inquiry
4486 members — last activity Jan 31, 2026 05:27PM
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Underground Knowledge — A discussion group
24723 members — last activity 6 hours, 46 min ago
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