This video is the first time scientists have ever been able to
image the whole brain of a vertebrate creature in such a way
that you can see individual cells and simultaneously how they're
firing and behaving in real time. This is how the brain really,
really works—and it's amazing.  The research, published in
Nature Methods, explains how scientists from the Howard Hughes
Medical Institute Janelia Farm Research Campus were able to use
a technique called high-speed light sheet microscopy to image
the activity of 80 percent of the neurons in the brain of a
zebra fish larva. They were able to capture images once every
1.3 seconds—which, as Nature explains, is a speed approximate to
neural activity patterns in the brain.  It remains to be seen,
however, if the technique can realistically be extended for use
in other creatures: the technology relies on light transmission,
which is possible in zebra fish larva because they are, weirdly,
transparent. Try stepping up to something like a mouse, and
you're currently ou