[Serious] What is the current best scientific evidence we have that shows that consciousness...

[Alan V]

Asking where you go after death is like asking where the music goes when the band stops playing...  it only exists in the memory of the people who heard it.

Consciousness is not a substance whose existence has to be explained, but an evolved function of a healthy brain of a certain complexity in a certain chemical and electrical state.  This is upheld by the fact that we lose consciousness or experience only partial consciousness every night when we sleep and dream.  Like you say, wondering where it goes is based on not conceptualizing consciousness correctly.

The problem is that people identify themselves as their consciousness, and they know they exist.  I think this is a holdover from religious dogma, from defining people as souls which inhabit bodies.  We are in fact bodies with brains, not essentially consciousness at all, but we are aware of ourselves only when we are aware at all.