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File:Vadim Starov – Founder and Chief-Instructor of Systema Spetsnaz – Russian Martial Arts.jpg - Wikimedia Commons
Caroli Linnaei, Sveci, Doctoris Medicinae systema naturae, sive, Regna tria naturae systematice proposita per classes, ordines, genera, & species - Biodiversity Heritage Library
![Wikipedia on Twitter: "Old & new on Cassini–Huygens spacecraft in news. Huygens' 1659 writings on Saturn, artwork of mission. More: https://t.co/KQdJF2AIVw–Huygens https://t.co/n49PXfAiRD" / Twitter Wikipedia on Twitter: "Old & new on Cassini–Huygens spacecraft in news. Huygens' 1659 writings on Saturn, artwork of mission. More: https://t.co/KQdJF2AIVw–Huygens https://t.co/n49PXfAiRD" / Twitter](https://pbs.twimg.com/media/C-VxfJvVYAEePK2.jpg)