When researchers presented sleeping volunteers with odors of rotten eggs or roses, the subjects who smelled rotten eggs reported more bad dreams while the subjects who smelled roses reported more good dreams. Researchers speculate that odors have a stronger effect on dream emotions than other external stimuli because the sense of smell is linked directly to parts of the brain associated with dreaming.
You’re no more likely to die during a dream about dying than at any other time. Dreams of dying are fairly common.
Pregnant women dream more often than average and tend to have greater recall of their dreams. Experts say this is caused by changes in hormone levels during pregnancy and because pregnant women sleep more, and thus dream more, than usual.