the lava creates a long line of mountains under the ocean called the Mid-ocean Ridge - the longest mountain range on Earth. The longest mountain range on land is the Andes in South America.

a mountain and a glass-smooth lake of cooling lava. Juno's principal investigator, Scott Bolton, announced the latest findings and the highly detailed animation made from the probe's latest data.

If there's one thing you, and Gollum, should know about volcanoes, it's that "lava=hot". That, and it's not a great idea to attempt to plug them up with concrete. The most common type of lava flow ...