Lake Salda, in southwestern Turkey, bears a close resemblance to Mars' Jezero crater, which is currently being sampled by ...

CAIRO — Archaeologists have discovered the large limestone burial chamber of an unidentified ancient Egyptian pharaoh near the city of Abydos dating to about 3,600 years ago during a chaotic ...

An ancient variant ... eroded by water. Limestone: Sedimentary rock composed of calcium carbonate. Microbial mat: Filamentous microbes forming a cover on a surface, such as lake bottom.