What color are these shells? The grove snail, Cepaea nemoralis, comes in a range of colors that can be roughly sorted into three groups: yellow, pink and brown.

Tracking color has been key to studying the evolution of this snail, however new research published in the journal Heredity highlights differences in the way humans see color that can make categorization a bit trickier (remember The Dress?)

“As scientists, to ensure the accuracy of our studies and the subsequent interpretat