Every year, wild and farmed fish are killed in great numbers to feed humanity. A new study discovers that some of the fish suffer between two to twenty minutes of intense pain, once they are ...

Artistic rendering of the sensory exoskeletons of the early jawless vertebrate Astraspis being attacked by the sea-scorpion Megalograptus in dark shallow waters. Credit: Brian Engh New fossil research ...

More information: Zhutong Zhang et al, Tempo of the Late Ordovician mass extinction controlled by the rate of climate change, Science Advances (2025). DOI: 10.1126/sciadv.adv6788 ...

Credit: Yara Haridy. Eventually, those pointy sensory structures drifted toward the mouth. As fish evolved jaws, the placement of odontodes shifted from the body surface to the oral cavity.

Teeth started out as armor Scientists from the University of Chicago have found that dentine first appeared in the armored skeletons of ancient fish. Their study looked at fossils from around 465 ...

The large tubules in another Ordovician vertebrate called Eriptychius were similar in structure to these sensilla, but did contain dentine. “This shows us that ‘teeth’ can also be sensory even when ...

Armored jawless fish like Astraspis and Eriptychius and ancient arthropods like Anatolepis coexisted in the muddy shallow seas of the Ordovician period, which occurred between 485.4 million and ...

A groundbreaking study published in Nature reveals that our teeth trace their origins back to the “body armor” of ancient fish that lived over 460 million years ago. Using advanced CT scans and ...

The next time you chomp on a popsicle, then flinch from a lightning bolt of pain, you can now have something legitimate to blame: a 465-million-year old fish. Researchers have found that dentine — a ...

Our sensitive teeth originally evolved from the "body armor" of extinct fish that lived 465 million years ago, scientists say. In a new study, the researchers showed how sensory tissue discovered ...

Armored jawless fish like Astraspis and Eriptychius and ancient arthropods like Anatolepis coexisted in the muddy shallow seas of the Ordovician period, which occurred between 485.4 million and ...