The death penalty, an American tradition on the decline

Capital punishment has been practiced on American soil for more than 400 years. Historians have documented nearly 16,000 executions, accomplished by burning, hanging, firing squad, electrocution, lethal gas and lethal injection. ...

Climate change affects breeding birds

The breeding seasons of wild house finches are shifting due to climate change, a Washington State University researcher has found.

How much does a kilogram weigh?

The kilogram doesn't weigh a kilogram any more. This sad news was announced during a seminar at CERN on Thursday, 26 October by Professor Klaus von Klitzing, who was awarded the 1985 Nobel Prize in Physics for the discovery ...

Researchers developing a new balance for the new kilogram

Technische Universität Ilmenau and the Physikalisch-Technische Bundesanstalt (the National Metrology Institute of Germany) are developing a balance which is required for measuring the redefined kilogram that will be introduced ...

Disseminating the new kilogram—an international 'dry run'

When the kilogram, the world's basic unit of mass, gets a new definition in 2018, it will be based not on a physical artifact but a constant of nature. However, researchers will still need to "realize" the new definition, ...

Important milestone reached on road to a redefined kilogram

In a secure vault in the suburbs of Paris, an egg-sized cylinder of metal sits in a climate-controlled room under three glass bell jars. It is the mass against which all other masses in the world are measured - by definition ...

SI Superheroes return with another weighty adventure

The nefarious Major Uncertainty has kidnapped Monsieur Kilogram, putting the world's measurements of mass in jeopardy. As the world spirals into "Mass Hysteria," the remaining SI Superheroes, champions of the metric system, ...

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