The rationality of scientific concept formation in theory transitions, challenged by the thesis of semantic incommensurability, can be restored by the "Chains of Meaning" approach to concept formation ...

A revolutionary law of physics explains it all—sports and technology, air currents and population growth, migration and social hierarchy. According to your book, physics describes the actions or ...

The weight of the kilogram may soon rest on the emptiness of a vacuum. Of all the standard units currently in use around the world, the kilogram -- the official unit of mass in the International ...

Thought experiments can be extremely powerful; after all, pretty much everything that [Einstein] came up with was based on thought experiments. But when a thought experiment turns into a real ...

Now there is a conundrum we can struggle with in the dead of night. But it is one that Brian Greene is actually equipped to try to answer in his latest book, Until the End of Time. Greene, director of ...

UC Berkeley emeritus professor John Clarke, UC Santa Barbara professor Michel H. Devoret and UC Santa Barbara professor John ...

There is a new standard in town, and it's sort of a big deal. This new standard is the definition of the kilogram, the unit of mass in the SI system—the International System of Units). It replaces the ...

Receive emails about upcoming NOVA programs and related content, as well as featured reporting about current events through a science lens. And how strange is it that we even have to ask? Unlike other ...