Space agency aims to alter orbit of rock by smashing spacecraft, known as DART, into its surface, in venture only attempted in science fiction

Prof. Roi Granot and Dutch scientists outline a theory of chain reactions in tectonic plates that they say determined the appearance of the world as we know it

Artist's four-meter-high globe is housed at Jerusalem aquarium before moving to permanent home in New York City's World Trade Center complex

Researchers say planet's reflectivity has dropped over the past 20 years, amid reduction in shiny, low cloud cover to the west of continental America

A previously flagged potentially hazardous encounter in 2068 has now been ruled out as dangerous

Scientists urge investigation of possibly unfrozen waters for potential life on future missions to neighboring planet