Neil Armstrong and Buzz Aldrin took one small step for man and one giant leap for mankind on the surface of the moon forty years ago.

On this special anniversary, Craig Nelson, author of Rocket Men, released ten little-known facts about the Apollo 11 mission that took Armstrong and Aldrin to the moon and back. 

The list highlights several aspects of space travel that have been updated and improved upon since that time, including restroom facilities.

Nelson writes that in 1969 "urinating and defecating in zero gravity...had not been figured out; the latter was so troublesome that at least one astronaut spent his entire mission on an anti-diarrhea drug to avoid it."

The waste ejection predicament of the Endevour at the international space station just seems to pale in comparison.