Tech

Neutrons unlock the secrets of Antonie van Leeuwenhoek’s microscopes

Enlarge / First microscope by Antonie van Leeuwenhoek. (credit: Tetra Images/Getty) In the late 17th century, a Dutch draper and self-taught scientist named Antonie van Leeuwenhoek earned renown for building some of the best microscopes available, at a time when the instrument was just beginning to revolutionize scientific inquiry. He rarely divulged his lens-making methods, however, […]

Tech

Restricted Data explores controversial history of nuclear secrecy

Enlarge / A “Restricted Data” classification stamp on a document from the US Atomic Energy Commission in the early 1950s. The document pertains to the classification of opacity calculations that were part of the work on the hydrogen bomb. The document is no longer classified and is available in the US National Archives. (credit: Alexander […]