What does space smell like?

Astronauts may not expose their nostrils to the vacuum of space, but folks who come back from space walks report that they've brought a very distinctive odor back with them. And the space stations have their own special (and not necessarily pleasant) scents, including perfume of the Mir Space Station, which is… » 7/21/12 11:30am 7/21/12 11:30am