If you thought that nothing could burn while sandwiched between two bricks of dry ice -- think again. Magnesium can combust in an atmosphere of pure carbon dioxide.

• 如果你认为，无论什么东西夹在两块干冰之间都不会燃烧，那么就大错特错了。镁就能在弥漫着纯净二氧化碳的环境下燃烧。