Curious Kids: why are some shells smooth and some shells corrugated?

Maëlle, 7, wants to know why some shells are smooth, while others are corrugated. It turns out that while corrugated shells are strong, smooth shells can move fast.

Curious Kids – News, Research and Analysis – The Conversation

Cold Press Ground Nut Oil, Packaging Type: Bottle, Cold Press Ground

Shellfish – News, Research and Analysis – The Conversation – page 2

2,709,778 Shell Images, Stock Photos, 3D objects, & Vectors

One student found a crab on the beach and we had to take a photo

Clams – News, Research and Analysis – The Conversation – page 1

Shells - Jewelry

Leeds Art Gallery - ART for MUSEUM FROM HOME Composition (1940) by

2,709,778 Shell Images, Stock Photos, 3D objects, & Vectors