What’s In a 20,000 Year-Old Cube of Ice?

Earth’s climate is changing in a big way, and it’s because there's more carbon dioxide in the atmosphere than at any point in our species’ history. But Earth’s climate has changed before. How do we know that this time we’re the cause? We know thanks to tiny bubbles of ancient atmosphere trapped in ice.

More Episodes

This Could Change the Future of Space Travel

I went to NASA in Houston to talk to astronaut Don Pettit.

The Strange (Unexpected) Reason Ice is Slippery

Why is ice slippery? It's a more complicated answer than it seems!

Recycling Is Broken. Here’s How We Can Fix It.

Recycling is broken. Here's how we can fix it.

Other Shows You May Enjoy