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The rats are tickled in one chamber, but not tickled in another chamber. Then they are given a choice between the chambers, and the one they spend more time in is considered to be the one that they associate with some positive event.

Recent comments

I agree that Microsoft has come under heavy attack in recent years, and yes, apple is picking up speed. However, Microsoft has always figured out a w (njdouglas86)
Yes, as I've mentioned on other threads, the flat galactic rotation curve does *not* mean the galaxy rotates like a solid disk. This is simply a loos (George Musser)
This is wrong. The linear velocity of the stars is constant, not the angular velocity. Here is a link to a plot showing the units of Km/s on the y ax (b_physics_guy)
For one, I am astonished to see someone claiming that opiods are not harmful. I watched my father suffer, because his doctor put him on Oxycontin. Th (Alyssa)
Great episode.. Saw it online.I usually download them to my iPod, but this one was rejected because it was "in a format that wasn't supported by my iP (Robert Hernandez)

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