Lawmakers worry that the incidents may represent "a grave threat" to national security due to the nature of the scientists' ...

From the first photographer star to the discovery of alien worlds, these night sky targets mark some of astronomy's greatest ...

NASA's Curiosity rover took this selfie at a site on Mars where it drilled a sample to search for organic molecules in ...

Scientists identify 45 potentially habitable exoplanets, using exact data and quotes to guide future telescopes in the search ...

Burundi has started returning Congolese refugees to eastern Democratic Republic of Congo with the first organized convoy ...

Around 100 people were arrested on Wednesday as part of an operation to disperse a group of refugees and asylum seekers who ...