Fig. 3. Lunar volcanic landforms. (A) Floor-fractured crater (44.3°E, 46.5°N), LRO WAC mosaic. (B) Lava flows in the southwestern Imbrium (330.4°E, 25.5°N), Apollo photograph AS15-M-1701. (C) Sinuous ...

NASA's Mars Odyssey spacecraft, which has been orbiting the Red Planet for over two decades, has captured a spectacular landscape image of a giant ancient volcano called Arsia Mons just before dawn.

Note: This is the fourth in a series of six Guest Opinions commemorating the Craters of the Moon National Monument Centennial. While southern Idaho’s vast Snake River Plain is lauded and renowned ...