Nasa has commissioned Steven Pearce, a chemist and managing director of fragrance manufacturing company Omega Ingredients, to recreate the smell of space in a laboratory.

[...] He said: "I did some work for an art exhibition in July, which was based entirely on smell and one of the things I created was the smell of the inside of the Mir space station.

"Nasa heard about it and contacted me to see if I could help them recreate the smell of space to help their astronauts.

— Read the rest at Space 'smells like fried steak' at The Telegraph. (thanks to Marcello for the link!)