Frozen Time: 800,000 Years Trapped

Scientists drilled to the bottom of Antarctica and pulled up an ice core showing our atmosphere from 800,000 years ago. They dug it up where it's so cold the ice just piles up, trapping history inside. Creating layers you can count like tree rings. Each layer is full of bubbles holding gases from that period's atmosphere. Every layer is a time capsule. Once a core is pulled up, researchers carefully slice it, then crush or melt it in a vacuum to prevent contamination. That releases the ancient gas bubbles so they can analyze them. They showing in changed in and they even 1.2 million years 1.2 million years.