Marlowe Hood, AFP

We don't know what this is going to do.

We need a new worst-case scenario, because we're already in our old one.

Here's what that means.

Here's what that means for the rest of us.

It is now doomed to disintegrate.

Setting it back an astonishing 15,000 years.

Only we can change this.

"There is no quick fix."

Scientists are watching closely.