Brisbane school students are getting the day off school, but they don't have much to cheer about: they are being urged to stay indoors as Cyclone Debbie moves down the east coast of Australia. Here's what you need to know.

Ah, that fresh smell just after it rains. It brings a sense of calm to the world. But did you know that it could kill you? That's right, rain launches (mostly harmless) bacteria into the air and in rare cases it can spread disease. Scientists didn't fully understand how the process works until now.