I just saw [They've Got a Secret/Family Ties/Look At The Princess PT 2: I Do, I Think] - don't people explode when they are "spaced"? (Last updated - 1/26/01)

This question has been answered in the newsgroup many times, in varying amounts of detail, and a number of extended discussions have resulted from it.  Instead of rehashing the entire debate, here's the short answer, excerpted from -


"... but theory predicts -- and animal experiments confirm -- that otherwise, exposure to vacuum causes no immediate injury. You do not explode. Your blood does not boil. You do not freeze. You do not instantly lose consciousness. "

Check the website for a more in-depth answer, and links to other sites dealing with this question.

Here's another site -


with a slightly off-beat, but accurate answer to the question.