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.
The rings of clam shells have revealed 1,000 year's worth of marine climate history.
What are the oldest living animals on the planet?
Three distinct cryptic species of clams have been discovered on the southern coast of Australia. Until recently, the clams…