An enzyme that makes the male sex hormones has unravelled a fresh clue about how snail shells come to be curly. It's a new twist on how scientists thought snails and molluscs develop and form their ...

As stars age, they often shed their skins, so to speak, casting off expansive shells of dust and gas into interstellar space. As stars age, they often shed their skins, so to speak, casting off ...

Mollusks have produced many evolutionary innovations since they first appeared 540 million years ago, including spiral shells and a toothed tongue. A new study shows that about half of these ...

Ammonites are among the most common marine fossils from the age of the dinosaurs, but no one has found one like this before. It shows one of the swimming marine molluscs without its distinctive spiral ...