Why is the sky blue? Why is the sea salty? Here are Six facts that you have always wondered about! Do support our channel and like and subscribe ! #faWhy is the sky blue? Why is the sea salty? Here are Six facts that you have always wondered about! Do support our channel and like and subscribe ! #faWhy is the sky blue? Why is the sea salty? Here are Six facts that you have always wondered about! Do support our channel and like and subscribe ! #fa