How Does the Brain Decide What to Remember and What to Forget?

Imagine your brain is like a toybox, every day, it gets new toys (memories). But there's only so much space. It decides which toys are the most fun to keep and which ones can go back in the box. The brain uses special helpers called neurons and chemicals to decide what to remember and what to forget.

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Examples

  1. You remember your birthday party because you had cake, but forget the name of a classmate who sat next to you.
  2. Your brain remembers that fire burns because it hurts, but forgets the brand of your favorite shirt.
  3. You recall the lyrics to your favorite song, but forget what you did yesterday.

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