Allen Telescope Array campaign shows slow changes in radio scintillation that can nudge pulsar timing by billionths of a ...

Between the 16th and 19th centuries, when colonialism was the prevailing order, it is not surprising that scientific expeditions, specimen deposits in natural history museums, and descriptions of ...

He gave readers a comprehensive and lyrical account of the historic mission in 1969. His science coverage as a Pulitzer-winning journalist and an author took him around the world. By Robert D.