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A recent study in the journal Meteoritics and Planetary Science threw cold water on the idea — the microbes on Ryugu almost certainly came from Earth rather than outer space.

A team of international researchers collaborated on the study, which is published in the journal Meteoritics And Planetary Science.

According to Denton S. Ebel of the AMNH, who specializes in meteoritics, chondrites make up about 85 percent of all meteorites.

As reported earlier this month in the journal Meteoritics & Planetary Science, Botswana’s off-world visitor was once part of Vesta, a gigantic ramshackle asteroid forged at the dawn of the solar system.

“The best way to make friends and enemies in meteoritics is to publish another chondrule-forming model,” says Connolly.