Until now, scientists believed that Mars’ skylights – pits in the surface of mars – were formed by volcanic activity. But data from Nasa’s orbiters suggests there are karst caves – underground bunkers ...

For generations, the question of whether life exists beyond Earth has captivated humanity. On Mars, faint traces in ancient ...

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Mars and Martians. They go together in the public's mind. The Earthling fascination with "alien invaders" goes back a long time. But why? And what does it say about all of us here on Earth? Dean ...