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Diane Thompson , Roberto Pépolas  and Alexander Tudhope use a vegetable-oil-powered hydraulic drill to take a core from a Porites lobata coral head near Wolf Island in the Galápagos. 
(left) Diane Thompson , Roberto Pépolas and Alexander Tudhope use a vegetable-oil-powered hydraulic drill to take a core from a Porites lobata coral head near Wolf Island in the Galápagos.