Wiktor Toporek's Profile > Wiktor's Groups

Polska / Poland
6359 members — last activity 5 hours, 3 min ago
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Hard SF
1209 members — last activity Jul 27, 2026 09:48AM
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Science Book Club
342 members — last activity Apr 14, 2026 10:04PM
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Science and Inquiry
4531 members — last activity Jul 28, 2026 02:27PM
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Underground Knowledge — A discussion group
25997 members — last activity 36 minutes ago
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