What would life be like if the moon suddenly vanished from existence?
Would humans survive? What would happen to the Earth? What kind of creatures would survive/evolve?
What if the moon never existed? Check out A Moon Full of Magic for the scientific details I have learned if you would like, but design your own Earth - history, creatures, plants and any other sort of life.
Detail a day in the life of no moon. You can pretty much take this anywhere. Good luck, and let me know the amazing things you come up with!