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Links to learn more below:
music by http://youtube.com/JakeChudnow
"Space Oddity" sung in space by Chris Hadfield: http://www.youtube.com/watch?v=KaOC9danxNo
http://www.howmanypeopleareinspacerightnow.com
Tears in space: https://www.youtube.com/watch?v=P36xhtpw0Lg
Chris Hadfield's videos: https://www.youtube.com/user/canadianspaceagency
My video with minutephysics that talks about oribits: http://www.youtube.com/watch?v=hYf6av21x5c
First man in space: http://en.wikipedia.org/wiki/Yuri_Gagarin
list of people who have been to outer space: http://en.wikipedia.org/wiki/List_of_space_travelers_by_name
history of humans in space (good timeline): http://en.wikipedia.org/wiki/Human_spaceflight
Good read about "zero-gravity" vs zero-g: https://groups.google.com/forum/#!msg/sci.space.station/qZtamv_Dg04/aOdakbzQeIgJ
Orbit: http://www.orbspace.com/Background-Information/Suborbital-vs-Orbital.html
weightlessness: http://en.wikipedia.org/wiki/Weightlessness
NASA info on how zero-g affects people: http://science.nasa.gov/science-news/science-at-nasa/2001/ast02aug_1/
flame in space [VIDEO]: https://www.youtube.com/watch?v=Q58-la_yAB4
zero-g biology flow chart: http://www.nsbri.org/humanphysspace/focus6/spaceflight-frame.html
2suit: http://www.wired.co.uk/news/archive/2009-04/30/a-two-seater-suit-for-space-lovers
what if a baby was born in space? http://quest.arc.nasa.gov/people/journals/space/currier/08-26-99.html
conception and fertility in space:
http://www.escapistmagazine.com/news/view/113507-Microgravity-Makes-Interstellar-Travel-Impossible-Say-Experts
http://weboflife.nasa.gov/currentResearch/currentResearchBiologyGravity/floatingFertility.htm
http://www.lifeslittlemysteries.com/1119-space-sex-pregnancy.html
zero-g studies:
rat fetus: http://www.ncbi.nlm.nih.gov/pubmed/3762055
pregnant rats: http://jp.physoc.org/content/565/2/593.full
http://www.ncbi.nlm.nih.gov/pubmed/8371056
muscles: http://jeb.biologists.org/content/204/18/3201.full.pdf and http://www.bio.unipd.it/bam/PDF/EJTM1-3/Bosco.pdf
radiation and mice brains: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0053275#pone-0053275-g005
importance of activity on bone growth: http://ajcn.nutrition.org/content/71/6/1384.long
Dangers on zero-g:
http://library.thinkquest.org/03oct/01581/SpaceTravelEnglish/dangers/puffy.html
http://weboflife.nasa.gov/learningResources/vestibularbrief.htm
getting taller while in space: http://www.space.com/19116-astronauts-taller-space-spines.html
tools for combatting zero-g atrophy: http://www.kcl.ac.uk/biohealth/research/divisions/chaps/research/innovation.aspx
comparrison of zero-g bone growth to diseases like rickets: http://bit.ly/13qC6zA
rickets:
http://medical-dictionary.thefreedictionary.com/Rickets
http://en.wikipedia.org/wiki/Rickets
plankton numbers: http://www.chukchiscience.com/StudytheScience/Zooplankton/tabid/223/Default.aspx
plankton from space: http://www.diatomventures.com/Photos.html
the mystery of "body" etymology:
http://www.oed.com/view/Entry/20934?rskey=uV3kZk&result=1#eid
http://kaylapeve.blogspot.co.uk/2011/04/body-etymology.html