Specifically, the scientists found 266 kinds of fungi and 305 types of bacteria ... and some were proven to be viable when they multiplied in Petri dishes. Rodó tells the Guardian’s Damian ...

She grew the belly-button bacteria in a petri dish and then added it to milk. Sure enough, after a few hours, the milk curdled into cheese. Belly-button Brie, anyone? Now, for the most part ...

An inoculating loop can be used to transfer bacteria. It is sterilised by heating it to red hot in a Bunsen flame, before and after use. To inoculate the agar, lift the lid of the Petri dish and tilt.