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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
(a) Unfertilized egg of thick-toed gecko laid by a female on the wall of a flight container (Foton-M3, 12 days flight, 2007). (b) Male ornate day gecko before the flight experiment onboard unmanned spacecraft Foton-M4 (44.5 day flight, 2014).