The best way to detect aliens may be by finding their footprints
Sign of life: Mars rover tracksNASA/JPL-CaltechBy Mika McKinnonTo detect traces of alien life, try to find their footsteps. The first signs of life on another planet may not be a complex signal captured by an antenna or images of a scampering creature on an alien horizon, but a track left in long-dried mud. On Earth, palaeontologists study traces left...
I regard the brain as a computer which will stop working when its component fail. There is no heaven or afterlife for broken-down computers. That is a fairy story for people afraid of the dark