Asteroid tells secrets of Earth’s ‘far wetter’ building blocks

Earth’s building blocks were “far wetter” than previously imagined, new analysis of tiny samples from a distant asteroid has suggested, overturning long-held assumptions about the early solar system.

Research on a tiny portion of the 5.4 grams of rock and dust collected from the Ryugu asteroid, some 300 million kilometres (185 million miles) from Earth, offers new insights into how the solar