Recently looked at youtube video: The Nightline Face-Off: Does God Have a Future. (http://youtu.be/6-8-Yxdphsg)
In this Sam says that consciousness is dependent on brain so consciousness cannot exists without brain (not precise words). I think science in general agrees with this.
Now how can you explain someone remembering previous life? Agree there can be many bogus cases but there are some cases not easy to deny where children knowing details of remote location and/or language from previous life which is not possible logically. Here is one example on youtube: http://youtu.be/WoSrzpLoODo
If consciousness cannot transcend body, how can such memory be transferred from a body to another?