Research by Weiner and Brown, 1993: certain aromas inspire individuals to set higher personal goals, take on greater challenges, and get along better with others. Neurologist Alan Hirsch discovered that groups exposed to the aroma of peppermint solved puzzles 30% faster than the unexposed control groups. Basil, lemon, cinnamon, and rosemary seem to have a similar stimulating effect. (Teaching tips in a nutshell, University of Colorado. Brain-based Learning 1—Optimal Environments.)