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Sources:
0:30 Jason M Ramos, CC BY 2.0 https://creativecommons.org/licenses/... via Wikimedia Commons
2:28 Dietmar Rabich / Wikimedia Commons / “Karlsruhe, Elektrotechnisches Institut 2013 5260” / CC BYSA 4.0
2:45 The original uploader was AlterVista at German Wikipedia., CC BYSA 3.0 http://creativecommons.org/licenses/b... via Wikimedia Commons
2:50 Wellcome Images, CC BY 4.0 https://creativecommons.org/licenses/... via Wikimedia Commons
3:37 Jar.ciurus, CC BYSA 3.0 PL https://creativecommons.org/licenses/... via Wikimedia Commons
4:30 stavros1, CC BY 3.0 https://creativecommons.org/licenses/... via Wikimedia Commons
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6:32 Johannes Robalotoff, CC BYSA 3.0 DE https://creativecommons.org/licenses/... via Wikimedia Commons
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13:42 Adam Jones, Ph.D., CC BYSA 3.0 https://creativecommons.org/licenses/... via Wikimedia Commons
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14:10 Paul Arps from The Netherlands, CC BY 2.0 https://creativecommons.org/licenses/... via Wikimedia Commons
14:14 Bundesarchiv, Bild 146197206201 / CCBYSA 3.0, CC BYSA 3.0 DE https://creativecommons.org/licenses/... via Wikimedia Commons
14:42 Fridolin freudenfett (Peter Kuley), CC BYSA 3.0 https://creativecommons.org/licenses/... via Wikimedia Commons
14:50 Fridolin freudenfett (Peter Kuley), CC BYSA 3.0 https://creativecommons.org/licenses/... via Wikimedia Commons
17:28 MichaelLeukert, CC BYSA 3.0 https://creativecommons.org/licenses/... via Wikimedia Commons
17:58 I, Seglea, CC BYSA 3.0 http://creativecommons.org/licenses/b... via Wikimedia Commons
18:13 EvaK, CC BYSA 2.5 https://creativecommons.org/licenses/... via Wikimedia Commons
18:18 Benutzer:Sansculotte. Bild ist unter der GNU FDL zur weiteren Verwendung freigegeben. Creative Commons AttributionShare Alike 3.0 Unported Photographiert 02/2003
18:32 Chaim Weizmann image: Government Press Office (Israel), CC BYSA 3.0 https://creativecommons.org/licenses/... via Wikimedia Commons