Archive · 22 May 2025
Ancient Fish Armor Reveals Evolutionary Origins of Human Teeth
Imagine your teeth are like tiny sensors!
Scientists looked back millions of years to find where teeth came from.
They studied ancient fish that lived long ago and found that the fish's body armor had a similar makeup to our teeth.
These fish used these parts to feel things around them, like how our teeth are sensitive.
This study suggests our teeth evolved from these sensory parts on the outside of ancient animals, making them sensitive to things around us.
Researchers studied the origins of teeth, linking them to ancient fish.
Human teeth may have evolved from the 'body armor' of extinct fish.
High-resolution CT scans analyzed jawless fish species like Anatolepis heintzi.
Researchers found dentine-lined pores on the fish, similar to sensory organs.
The study supports the 'outside-in' hypothesis of sensory structure evolution.
- Who
- Researchers, including Yara Haridy, studied ancient fish species like Anatolepis heintzi.
- What
- Researchers discovered sensory tissue on ancient fish exoskeletons linked to the 'genetic toolkit' that produces human teeth.
- When
- 465 million years ago
- Where
- Study focused on ancient fish fossils and modern marine life.
- Why
- To understand the origins of teeth and their sensory functions.
- Time Period
- 465 million years ago
- Key Species
- Anatolepis heintzi
- Key Tissue
- Dentine
- Function
- Sensory Organs
- Supporting Theory
- 'Outside-in' Hypothesis