More and more evidence has accumulated which shows that changes in global and regional climate over the last 50 years are almost entirely due to human influence.
New analysis of data from the Apollo era shows that moonquakes occur close to visible faults, which may matter when setting up a moon base.
Lord Howe Island is part of an underwater volcanic chain much older than first thought, with the possibility of new islands still to form.
They erupted for billions of years and make Earth's volcanoes look like molehills. Here's what we know and what we don't know about them.
The planet is more similar to Earth than any other – except when it comes to supporting life.