Misc: What major does david bowie's space oddity refer to?

Questions

40 people are sent to the hospital for ---------- bites every minute?

---------- of the cells in your body will die and be replaced with new cells all while you have been reading this sentence?

---------- of people wash from top to bottom in the shower?

---------- of the population can curl their tongue into a tube?

85% of the population can curl their ---------- into a tube?