2017 was a year of excitement among the asteroid-watching community, as ‘Oumuamua, the first recorded visitor from an another solar system, took a spin around our sun before launching itself off into the inky blackness of space.

According to a team at the University of Johannesburg, though, ‘Oumuamua is far from the first visitor from another solar system that we have available to study. One such alien rock is right here on Earth, making it far easier to study.

The anomalous rock widely called the Hypatia stone was discovered in 1996 in a remote part of the Sahara desert, surrounded by strange yellow glass that defied explanation. For two decades, scientists have endeavored to discover the rock’s origins, and find out exactly how it was formed, and how it arrived in the middle of the desert.

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