Why is Mars barren and uninhabitable, while life has always thrived here on our relatively similar planet Earth? A discovery made by a Nasa rover has offered ...

Astronomers yesterday confirmed the discovery of an interstellar object racing through our Solar System — only the third ever ...

Pioneering space scientist Charles "Chuck" Sonett, the first head of the University of Arizona's department of planetary sciences, has died. He was 87. Sonett, who had Parkinson's disease, died ...