Oldest Material on Earth Discovered
Previously, the oldest pre-solar grain dated with neon isotopes was around 5.5 billion years old. The findings shed light on a debate over whether or not new stars form at a steady rate, or whether there are highs and lows in the number of new stars over time. “Thanks to these grains, we now have direct evidence for a period of enhanced star formation in our galaxy 7 billion years ago with samples from meteorites. This is one of the key findings of our study,” said Philipp Heck.