Initial analysis by Eizo Nakamura of Okayama University showed that soil sample from the Ryugu asteroid, brought back to Earth by Hayabusa 2, contains enough hydrogen and molecules of organic substances that can be ingredients of life.
From Asahi Shimbun:
The Japan Aerospace Exploration Agency announced the discovery on June 17 at a news conference it held prior to starting a full-scale analysis of the soil samples brought back by the space probe.
The discovery is expected to assist in investigating the theory that the elements that created life on Earth arrived from space.
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Nakamura said that a large number of hydrogen atoms, believed to have constituted water molecules, were discovered in soil collected from and below the surface of Ryugu. Hayabusa 2 collected the underground soil samples by blasting an artificial crater on the asteroid.