Hotspot volcanoes

Why are volcanoes on Mars so different from those on Earth?

This week, NASA announced that it had discovered one of the youngest, possibly the the youngest major volcano on Mars to date. Arsia Mons – a gigantic 110 kilometer (68 mile) caldera, which is also more than twice the height of Everest – was previously known, but new satellite observations have been used to get […]

Hotspot volcanoes

Hawaii Volcanoes Map

Having just visited Hawaii, I was curious about the island chain and all of its volcanoes. I read some general things about volcanoes in my travel guides, but wanted more details. Which ones are active? Is it possible to reach the top on all of them? Which are accessible by car or on foot? Where […]