A 4-Billion-Year-Old Piece of Earth's Crust Has Been Identified Beneath Australia - ScienceAlert

Scientists can use various clues to figure out what's under Earth's surface without actually having to do any digging – including firing super-fine lasers thinner than a human hair at minerals found in beach sand.

Scientists can use various clues to figure out what's under Earth's surface without actually having to do any digging including firing super-fine lasers thinner than a human hair at minerals found in… [+3367 chars]

full article...