A question about the subconscious mind.....?

I heard on tv about 6 months ago that some scientists said that your subconscious mind knows what your conscious mind is about to think before it thinks it. And they said they have the evidence to prove it. I only just remembered this recently & started to look more into it. I have been researching but have found nothing about it so far. Not a damn thing. Does anybody else know anything about this? Where's the evidence?