What can star variability—changes in a star's brightness over time—teach astronomers about exoplanet habitability? This is ...

Several small worlds beyond Jupiter are not just frozen rubble. Beneath their shining skins, many hide oceans of liquid water. New research says those seas do not always stay calm. When the ice lids ...

Border Patrol is monitoring US drivers and detaining those with 'suspicious' travel patterns 'Rush Hour 4' will be ...