These extinct shelled cephalopods ruled the ocean for 300 million years. But how they swam and shaped the seas remains a mystery. "Snake stones" or ancient sea creature? Credit: opacity/flickr/CC ...

The Ammon swimming pool, which has been open for more than half a century at McCowin Park, is closed this week for repairs to its water pump. The city of Ammon announced the 55-year-old pool’s closure ...

Robotic ammonites, evaluated in a university pool, allow researchers to explore questions about how shell shapes affected swimming ability. They found trade-offs between stability in the water and ...

Did ancient ammonites sink or swim? This X-ray image of a fossil is bringing their shells back to life to help tell us if they could move freely through water. We think that ammonites, which lived up ...

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 ...

In a university swimming pool, scientists and their underwater cameras watch carefully as a coiled shell is released from a pair of metal tongs. The shell begins to move under its own power, giving ...