I used to believe the old story of how water drains backwards in the southern hemisphere. I believed this until I was 24 years old and actually researched it. I regularily run into people who still think it is true, but I can't laugh at them because... well, that used to be me.
A childhood belief about water

others believed things like this
- I used to think that when a movie was 'based on a true story' it was happening for real then and there— Tom
- I once believed that one could run around the south pole in order to travel backwards and forwards in time.— kaibutsu
- My 6 years younger sister used to tell me that I was younger than her. She was just growing backwards.— Taryn
- I used to belief that mermaids lived in underground drains. Anon
- When i was little i thought that people could laugh in different languages— Lauren
- Until I was about 12 years old I believed that homeless people were made up by my parents to scare me.— Angela B.