Benji Jones: You could say there are two types of mould: the good and the bad.
Penicillium notatum, for example, gave rise to the drug penicillin. Which, by some estimates, has saved at least 200 million human lives.
While other molds, like Aspergillus flavus, produce toxins that can harm and even kill you.
But whether or not you want it around, mould is everywhere.
In fact, you’re likely breathing it in right now. And there’s pretty much nothing you can do to get rid of it.
Mould is a fungus, like mushrooms. And it’s made up of thousands of threadlike filaments called hyphae. It uses those filaments like roots: to feed.