Study Confirms Teeth Originated as Sensory Structures in Ancient Fish Armor
- On May 21, 2025, researchers at the University of Chicago revealed that teeth originally developed as sensory structures embedded in the protective skin of early vertebrates living approximately 465 million years in the past.
- This finding follows a detailed analysis of fossil specimens using advanced CT and synchrotron scans that clarified previous confusion about early vertebrates and invertebrates.
- The study showed that structures called odontodes, which contained dentine and nerves, initially served to detect water conditions rather than for chewing or defense.
- Lead author Yara Haridy explained that teeth can function as sensory organs even when located outside the mouth, while senior author Neil Shubin emphasized that detecting characteristics of the surrounding water was crucial for survival in a challenging predatory environment.
- These insights suggest that sensory tissue preceded oral teeth, refining the timeline of vertebrate evolution and supporting the theory that teeth evolved from external sensory structures.
Insights by Ground AI
Does this summary seem wrong?
32 Articles
32 Articles
All
Left
4
Center
9
Right
2
Our sensitive teeth likely evolved from the armor of ancient fish
A new study reveals that the sensitivity of teeth, which makes them zing in a dentist's chair or ache after biting into something cold, can be traced back to the exoskeletons of ancient, armored fish.
·Washington, United States
Read Full Article

Toothache from eating something cold? Blame these ancient fish
New research shows that dentine, the inner layer of teeth that transmits sensory information to nerves inside the pulp, first evolved as sensory tissue in the armored exoskeletons of ancient fish.
·United States
Read Full ArticleCoverage Details
Total News Sources32
Leaning Left4Leaning Right2Center9Last UpdatedBias Distribution60% Center
Bias Distribution
- 60% of the sources are Center
60% Center
L 27%
C 60%
13%
Factuality
To view factuality data please Upgrade to Premium
Ownership
To view ownership data please Upgrade to Vantage