Black bread mould (Rhizopus spp)

At work the pupils do an experiment whereby they leave small pieces of bread in closed petri dishes in a combinations of warm / cold, wet / dry conditions to see which cause the most decay ( a bit like a nice version of body farms! ).
When we collected this batch together to go back out for the class to look at I noticed this piece had grown some really spectacular black bread mould (Rhizopus spp).
Black bread mould is a widely distributed Mucoralean mould, often found on the surface of bread. It reproduces asexually by spores found formed in the black pinhead-like sporangia. When mature these burst and the spores germinate to form the new mycelium (the thread-like growth in the picture).
Because these spores are commonly found in the air, it can often be grown by keeping moistened bread in an enclosed, humid environment. Which is exactly what we did!
I am hoping the forecast 'Heavy showers' miss us tomorrow, and I have a chance to go out blip hunting!