Deep craters, glowing lava, high peaks: while volcanoes may be dangerous, they increasingly are tourist attractions in their own right. They offer travellers an incomparable experience of nature – while at the same time possessing the ability to paralyse ...

A massive, iron-rich structure sitting at the base of Earth’s mantle beneath the Hawaiian Islands may be doing more than scientists previously understood to fuel the archipelago’s volcanic activity. New seismic and geochemical research is building a clearer picture of this deep anomaly,