A team of researchers has made strides in understanding the formation of massif-type anorthosites, enigmatic rocks that only formed during the middle part of Earth's history. These plagioclase-rich ...

Imagine Earth at a time when it was almost unrecognizable—a landscape that was barren and with barely breathable air. That is what Earth looked like about 1.75 billion years ago. But scientists now ...

Whether standing stones, nondescript mounds, or lines in the earth, ancient civilizations have left signs of their existence that must have held deep meaning for them that is now lost to time.

Ancient civilizations left behind enigmatic sites like the Plain of Jars, Nazca Lines, Paracas Candelabra, Yonaguni Submarine ...