Identical twins that have lived together all their life can probably anticipate thoughts by just looking at eachother. They are so similar that they generally have the same cognitive processes and thus are able to operate as one - some of the time. I imagine a close nit married couple could be somewhat similar as well.
I believe mind reading is entirely possible. But to describe it is infinitely harder. I think it's more of a matter of
knowing described by the metaphysical rather then something concrete such as something to do with anatomy. Not that science couldn't eventually describe it.
Interesting idea though.