Tell me you haven't wondered how much clouds weigh.
Everyone I've asked so far says they've never thought about it* but I certainly have.
But now I know the answer.
Clouds weigh a lot of elephants. Cumulus clouds about one hundred elephants.
Which brings me to my next answered query:
Why do elephants have trunks?
Don't let the elephant's child fool you...
*Then they all gave me rather strange looks, sighed and walked away.