The common roundworm shares a surprising amount of genetic material with humans - enough, in fact, to make them good substitutes for astronauts in low-gravity medical studies.
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2015/23may_roundworms/
SCIENCECAST VIDEO: https://www.youtube.com/watch?v=N8wVRZwL_Qc&feature=youtu.be
