A Supercell Thunderstorm Cloud Over Montana Image Credit & Copyright: Sean R. Heavey Explanation: Is that a spaceship or a cloud? Although it may seem like an alien mothership, its actually a impressive thunderstorm cloud called a supercell
Erupting volcano - Most of the geodes that we find today were actually created when ancient Volcanoes erupted! As the lava cooled, air bubbles became trapped inside creating empty pockets. Over millions of years these pockets filled with the minerals
Sunset on Mars: "On May NASA's Mars Exploration Rover Spirit captured this stunning view as the Sun sank below the rim of Gusev crater on Mars. This Panoramic Camera mosaic was taken around in the evening of the rover's Martian day, or sol.