If you have a severe case of achluophobia (fear of the dark), for instance, you may want to wait at the mouth of the cave.

Dilatant or shear thickening fluids are liquids in which viscosity increases as the applied stress increases, whereas pseudoplastics or shear thinning fluids are characterized by the opposite relationship between viscosity and applied stress.

He sang solos from La Grande Duchesse, and many other opera-bouffe songs, with great taste and verve.

Programs range from hour-long combinations of services (massage, exfoliation, wraps, facials and bliss-inducing oildowns with exotic names like Ayurvedic) to day-long agendas. Upon arrival at the spa, I'm led to an all-white room where ethereal New Age music is playing — an Enya song; luckily, no Kenny G. I alert the aesthclician, a serene Israeli woman named Anal, that I'm none too partial to oils, gels, goops and the like.