Imagine popping open a rock and releasing air that’s been trapped since before the dinosaurs! Scientists in Australia did just that, cracking open ancient halite (yep, basically salt) and finding air bubbles from 815 million years ago. Turns out, Earth’s oxygen levels back then were only about half of what we breathe today. This wild discovery is helping us piece together how life and our atmosphere evolved. Who knew a chunk of salt could hold such epic secrets? #Science #ScienceNews #EarthHistory