
Opportunity (MER-B) is a robotic rover developed by the National Aeronautics and Space Administration (NASA) of the United States as part of the Mars Exploration Program. It was designed to collect long-term data on the surface of Mars, conduct geological studies, and obtain evidence of past water presence. The vehicle, particularly through the findings obtained during its mission, provided significant scientific data indicating that water once existed on Mars.Mission Description and Development
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Osman Özbay

Sivas Province is home to the Altınkale Travertines, located within the Sıcak Çermik thermal area, and is one of Türkiye’s significant geological and hydrogeological formations. The region is notable for its yellow-hued travertine terraces, formed by thermal waters rich in limonite and hematite minerals. Altınkale exhibits structural characteristics similar to the Pamukkale travertines in Denizli and covers an area of approximately 40,000 m².Sivas Altınkale Travertines (Republic of Türkiye Sivas
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Hatice Senem Turan