Bacteria timelapse

Here's a link to a higher resolution vid on youtube.

We're gearing up to do How clean is your mouth? at the NEC's science event for youngsters - The Big Bang on 15th March. As well as looking at plaque bacteria we're also preparing posters and video displays, which I hope will include this one. Its been devilishly hard to make work - the agar kept drying out - but finally it looks like we have something, though as Mr H says its not really thrilling - I'll have to add some stills I think for a longer sequence with a bit more pizazz!