Chemists at Plymouth University have identified the sticky substance that has killed hundreds of sea birds off the Devon and Dorset coast.
Their findings suggest it's a form of Poly Isol Butene, or PIB, used as a lubricating additive in oils to improve performance.
Tamsin Eames reports:
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Nearly 600 patients turned up at the casualty unit last weekend.
When Mohammad Leily arrived in the West Country four years ago as a refugee from Syria, he could barely speak English.
Devon Wildlife Trust says the strawberry spider was found at Meeth Quarry nature reserve.