They're floating away. Floating away? But how? Did you ever wonder why hot air balloons float? You may already have some ideas. Think about them and then choose one of the options below that seems ...

They came across an old Mylar balloon, which had been in the water long enough that the metallic coloring had begun to peel away. The word "birthday" was still just about visible. After dragging ...

But opponents argue that a balloon floating in the ocean would take a lot longer to degrade than it would on land. While it's hard to know whether balloons that have turned up in the stomachs of ...

The first super pressure balloon flight of NASA's New Zealand Balloon Campaign reached its float altitude after lifting off ...