Bookosmia Spotlight

Hey everyone, your best friend Sara here! Read this amusing poem by 11 year old Aadyot Sengupta from Bangalore. Can you help him solve the mystery?
Poem: The Ugly Mystery- Read with Sara
One day, I, a bit of a know-it-all, was passing through the city,
When someone came to me – a mystery.
People over there asked, “Why is the sky blue?”
And I did not have any clue.
After that I saw a river,
Where I noticed a cute little beaver!
And then I felt a bit of a shiver.
When I took him on my palm,
He felt very, very calm.
And when I asked him the query,
He replied that he was an absentee,
During his astronomy degree.
This was the first time in history,
That I could not solve a mystery!