Ancient rocks from Greenland, Canada and Hawaii preserve a rare chemical fingerprint that may come from the Earth before the moon-forming impact, a new study reports.

Scientists discover 1st evidence of 4.5-billion-year-old 'proto-Earth' buried deep within our planet

Source: space
Source Link: https://www.space.com/astronomy/earth/scientists-discover-1st-evidence-of-4-5-billion-year-old-proto-earth-buried-deep-within-our-planet