scientific

This Is Your Brain

University of California researchers have created  a system that shows how the brain works in real time, allowing users to navigate right inside their own heads and see their neuronal activity firing in 3D.

Each color represents source power and connectivity in a different frequency band (theta, alpha, beta, gamma) and the golden lines are white matter anatomical fiber tracts. Estimated information transfer between brain regions is visualized as pulses of light flowing along the fiber tracts connecting the regions.

Fig. 85. La Terre dans le ciel, telle qu’on la voit de la Lune (The Earth in the sky, as seen from the Moon), 1881.

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Is the multiverse a scientific theory?

“The thing is, the Multiverse is not a scientific theory on its own. Rather, it’s a theoretical consequence of the laws of physics as they’re best understood today. It’s perhaps even an inevitable consequence of those laws: if you have an inflationary Universe governed by quantum physics, this is something you’re pretty much bound to wind up with. But — much like String Theory — it has some big problems: it doesn’t predict anything we either have observed and can’t explain without it, and it doesn’t predict anything definitive we can go and look for.”

When people use the word theory colloquially, they use it to mean an “idea” or a “possibility” that could conceivably be at play. But a scientific theory has a much more stringent set of things it must accomplish: it must encompass all the successes of the previously leading theory, it must make successful predictions for phenomena that the leading theory cannot make, and it must predict additional, novel phenomena that can be either validated or refuted. So, is the Multiverse a scientific theory? It arises as a consequence of a scientific theory, but it fails on the grounds of making successful and novel predictions. While it might someday rise to the status of a scientific theory, it isn’t there today.