The volcanologist who climbs active volcanoes
Rosaly Lopes is a volcanologist at Nasa's Jet Propulsion Laboratory. She's spent her career scaling active volcanoes on Earth, and looking for undiscovered ones in space.
Find out how she manages to collect samples in a live eruption, and which volcano she recommends beginners visit for a spectacular experience.
Hear more of life as a volcanologist on The Conversation from BBC World Service.