Thoughtful Gifts for Curious People
The earthworm’s waves of peristalsis move it forward with the help of the setæ, alternately gripping and releasing the soil. This charming diagram shows the muscular effort which goes into their mighty soil-tilling efforts.
Also available in other styles and shapes.
Olive t-shirt, printed in colour.
Care: Machine wash cool. Tumble dry low. Do not iron text/images.