"Researchers have discovered that memory is changeable...."

Current events with commentary by Rabbi Avigdor Miller 

From NYPost.com:
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Thanks to science, you can soon wipe out your worst memories
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Many of us assume that memory is like a faithful recording of our lives stored in our brains, persistent and unchanging... Shockingly, that’s not the case. Researchers have discovered that memory is changeable.
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Dutch psychology professor Merel Kindt has seemingly found a way to erase the emotional anxiety associated with bad memories without erasing the memories themselves...

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From Ohr Avigdor Hakdama:

The awesome power of forgetting
Imagine a man who goes to sleep with serious worries hanging over his head. And yet the next morning he arises feeling like a new man. What happened? It wasn’t that he forgot his worries over the course of the night. One doesn’t forget in such a short period.

But Hashem designed an eraser of the mind — that eraser is sleep. It is a selective eraser because although it erases worry, it does not erase joy. If a person went to sleep with great happiness, such as having won a lottery or having received an honor, he would still be happy with it when he wakes up in the morning. However, troubles always become less intense after a night’s sleep. So we see that sleep is one of the methods which Hashem arranged to erase extreme worries from a person’s mind. This is necessary because otherwise a person couldn’t exist.
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Don’t take for granted the great gift of being able to forget your troubles. You should be especially grateful to Hashem when you see that after a period of distress you are able to return to a normal life. That thought should be in your mind when you say in Pesukei D’zimrah, He is the Healer of the broken-hearted. You are obligated to be grateful for the kindness Hashem has shown you in allowing you to forget.