Sensory features on the armored exoskeletons of ancient fish may be the reason why humans have teeth that are sensitive to ...

This explains the confusion with these early Cambrian animals. People thought that ... coexisted in the muddy shallow seas of the Ordovician period, which occurred between 485.4 million and ...

Teeth are sensitive because they evolved from sensory tissue in both ancient vertebrates and ancient arthropods.

Anyone who has ever squirmed through a dental cleaning can tell you how sensitive teeth can be. This sensitivity gives ...

The new study supports the idea that sensory structures evolved on exoskeletons at least 460 million years ago, and then later in evolutionary history, animals used the same "genetic toolkit" to ...

Ancient Fish and Human Teeth. The study surmises that those ancient, armored fish used dentin-based detectors to help survey ...

Life at the start of the Ordovician remained confined to the seas with new animals evolving in place of those that didn't survive the Cambrian. Chief among them were the squidlike nautiloids ...

tendons and an internal scaffold structure that gave the animal rigidity. We think it would have spent most of its life living on—or more likely just above—the seafloor, probably walking and swimming ...

Fossilization favors larger, protein-rich animals because they create oxygen-poor conditions that slow decay, helping explain gaps in the fossil record and the dominance of arthropods in ancient ...

Patterns of animal body size evolution have long been a focus of scientific research ... To explore the macroevolutionary potential of trilobites, the researchers compiled an extensive dataset of body ...

The Paleozoic era's Silurian period saw animals and plants finally emerge on land. But first there was a period of biological regrouping following the disastrous climax to the Ordovician.