Worm Watch Lab Talk
by mshep
Circular, on the right hand side at the start of the video.
Posted May 22, 2014 9:19 AM
by aexbrown scientist
It looks like it might just be a mark left in the food when the worm was picked to the plate (sometimes it's hard to avoid touching the surface when transferring the worm).
Posted June 3, 2014 5:33 PM
