1.   He detected the faint smell of blood just before the familiar but oddly stagnant odor of Jinju came rushing toward him.

2.   An offensive odor was coming from the basement.

3.   A wicked odor was coming from the closet.

4.   Control teams believe the odor came from some old space suit air filters that were being cleansed in an airlock oven.

5.   Norwood said odors come and go.

6.   Then the odor came, the odor of thousands of wasp corpses.

7.   The odor comes from a chemical called dimethyl sulfide.