This entertaining and insightful web series by mortician Caitlin Doughty answers the questions we are afraid to ask, or never really wanted to know, in case the answers make us even more afraid of death.
In episode 5 she answers what happens to our bodies in space, if cremating a larger person creates a grease fire, and how often people ask for parts of their loved ones before they're cremated. It's a ghastly good time, even if the subject matter makes you feel a bit queasy...
--via The Mary Sue
(talks about what happens with dead bodies)
and
Packing for Mars: The Curious Science of Life in the Void
(talks about space travel and the physical changes to the human body)