This illustration of the inner workings of a Leibniz calculator was originally published in Theatrum arithmetico-geometricum, das ist by Jacob Leupold. The Leibniz calculator, invented by Gottfried ...

Earlier this year, [Dan Maloney] went inside mechanical calculators. Being the practical sort, [Dan] jumped right into the Pascaline invented by Blaise Pascal. It couldn’t multiply or divide. He then ...

In the llate nineteenth century, with the successful introduction of commercial calculating machines, scholars looked with renewed interest in prototypes of such machines. One innovator who received ...

Earlier this year, [Dan Maloney] went inside mechanical calculators. Being the practical sort, [Dan] jumped right into the Pascaline invented by Blaise Pascal. It couldn’t multiply or divide. He then ...

__1675: __Gottfried Leibniz writes the integral sign ∫in an unpublished manuscript, introducing the calculus notation that's still in use today. Leibniz was a German mathematician and philosopher who ...

Steven Musil is a senior news editor at CNET News. He's been hooked on tech since learning BASIC in the late '70s. When not cleaning up after his daughter and son, Steven can be found pedaling around ...

On the morning of Nov. 1, 1755, an earthquake of 8.5 magnitude was felt across the Atlantic—from Scotland to Brazil—but Portugal bore the worst of it. For six catastrophic minutes Lisbon shook. The ...