Verified answer

This is a famous riddle made by Einstein himself.

https://www.youtube.com/watch?v=1rDVz_Fb6HQ

Also this a personal favourite of mine

https://www.youtube.com/watch?v=98TQv5IAtY8

Here are some well-written riddles:

(1)

From the beginning of eternity

to the end of time and space,

to the beginning of every end

and the end of every place.

(2)

Until I'm measured I am not known,

yet how you miss me when I have flown.

(3)

No sooner spoken, than broken.

Do I have to include the answers, or you want to figure them out on your own?

What does the fat lady sing when it's over?