A Scottish climber who gathered cosmic radiation readings on an expedition to Everest is to present his findings at a meeting of scientists next year.
Cosmic radiation dose rates increase where the atmosphere is thinner at high altitudes.
Bob Kerr took his readings in an effort to help Everest climbers, guides and sherpas to better understand the levels they are exposed to.
He will present his findings at Society for Radiological Protection meeting.
Next year's event will be held in Southport.
Mr Kerr works as a radiation protection adviser at the Dounreay nuclear plant in Caithness.
He took readings during a recent Everest expedition. A medical condition prevented him from striking for the summit, but a sherpa agreed to take the detectors to the top and back.
Mr Kerr has tackled some of the world's highest peaks, including Mount Vinson in Antarctica.