SpaceLooking back at Viking, the first mission to Mars Forty years ago, the Viking mission set the stage for real science in space – and without a human in sight. The Smithsonian pays tribute Culture
LifeIs NASA doing enough to look for alien life? A new study says Hubble's successor could spot alien life on three new exoplanets. Should NASA be doing more? Or is it right to focus on other priorities? ¿ìè¶ÌÊÓÆµ