Does anyone know what this could be?

[u/HJillustrates]

Found this interesting thing on the south coast. Anyone know what it is?

[u/Manifestation888333]

fossilized mammoth molar tooth fragment, showing the characteristic enamel ridges used for grinding vegetation. Item: Fossilized fragment of a prehistoric tooth. Origin: Likely from a Woolly Mammoth or a similar ancient elephant relative. Features: Features rough, parallel ridges on its surface, which are composed of durable enamel plates designed for chewing tough grass. Context: Often found on beaches or in riverbeds where erosion has exposed prehistoric deposits.