Scientists compare volcanic cones on Earth and Mars to explain how gas-rich magma forms scoria cones. Spacecraft observations and Earth analog sites provide evidence of similar eruptive processes.

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Since the 1970s, planetary geologists have known that volcanic features cover large swaths of Mars. Early Mariner 9 images ...

The radio 'howl' of a lightning-like discharge has been detected at Mars for the first time. While orbiting the red planet, NASA's MAVEN spacecraft recorded an unusual electromagnetic signal back on ...