Two wells will be drilled 2.8 miles (4.5km) and 1.5 miles (2.5km) into granite near Redruth, Cornwall, where the temperature is up to 200C (390F). Cold water will be pumped down to the hot rocks ...

An "amazing" new type of mineral has been discovered by scientists analysing a rock mined in Cornwall about 220 years ago. The dark green mineral has been named kernowite after Kernow, the Cornish ...