How did water originate on Earth? Data from asteroid Ryugu deepen mystery

Asteroid Ryugu was chosen for sending and returning a mission as it "belonged to a class of asteroids that are dark in colour and suspected to have water-bearing minerals"

As astronomers, the world over, continue looking for answers to the origin of the universe, one major curiosity is how water was formed or brought on Earth. The Hyabusa-2 spacecraft that recently returned with rock, soil samples from what is believed to be a part of water-bearing asteroid Ryugu is piquing interest globally even as the analysis of its capsule continues. 

While scientists hoped Ruygu would answer some of those questions, analysis of equipment onboard Hayabusa-2 mission reveals the asteroid was not rich in water-bearing minerals as some other asteroids. A study published in Nature Astronomy suggests that the ancient parent