Why Do we Dream?

A recent study tells that dreaming is a way humans use to erase off(atleast to an extent) painful memories.


The experiment was conducted by testing 34 healthy young volunteers, divided into two groups.All 34 volunteers were shown certain pictures to which, their verbal (and facial) reactions as well as brain activity (using MRI) were recorded.
One of the two groups was given sleep in between the two picture-showing-sessions, while the other had to remain awake.

The volunteers who slept between viewings reported a much milder emotional reaction to the images after the second viewing, reports National Geographic.

Interested readers may see further details here