Never See Again

Riddle: What is something that has happened, is still there in your mind, yet you will never see it ever again (unless you think about it)?

Answer: Yesterday.

Source: https://www.riddles.com/6343

What is something that has happened, is still there in your mind, yet you will never see it ever again (unless you think about it)? — Never see again by FluffyWolfo v1.

Riddle: What is something that has happened, is still there in your mind, yet you will never see it ever again (unless you think about it)? Answer: Yesterday. — by FluffyWolfo v2.