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145-million-year-old shark teeth found during railway construction

In 2025, East West Railway Company started initial construction activities along the route connecting Cambridge and Oxford, during which soil sampling uncovered shark teeth estimated to be over 145 million years old.
These findings occurred as part of ground investigations, which aim to build the railway in an environmentally friendly way over several weeks.
The soil samples also contained ammonites, ancient shellfish that lived during the Jurassic and Cretaceous eras alongside prehistoric sharks.
David Bray, EWR program director, described the ground work as a "vital early step" to design a safe, reliable, and environmentally respectful railway.
With over $1 billion already spent, the East-West Rail project will continue into the 2030s and is estimated to cost nearly $7 billion overall.

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