You can't directly smell anything in space. But astronauts report a distinctive odor when returning to the spacecraft after spacewalks—described as 'gunpowder,' 'brake pads,' 'seared steak,' 'ozone,' and 'walnuts.'

You can't directly smell anything in space. But astronauts report a distinctive odor when returning to the spacecraft after spacewalks—described as 'gunpowder,' 'brake pads,' 'seared steak,' 'ozone,' and 'walnuts.'