Learn how egg size may help explain why ammonites didn’t survive the end-Cretaceous extinction 66 million years ago, while their relatives, the nautiloids, did.
Ammonites were among the most spectacular inhabitants of the prehistoric oceans. These spiral-shaped mollusks swam the world's oceans for hundreds of millions of years and survived even the worst mass extinction ever. But when the asteroid struck 65.5 million years ago that proved fatal to the dinosaurs as well, it was suddenly over. Their distant cousin, the nautilus, did survive and lives […] More science? Read the latest articles on Scientias…
9 hours ago·Middelharnis, Netherlands (Kingdom of the)