Before hair, humans had to cover their head with whatever soft, stranded materials were available, which is why early humans often wore grass hats and watered each other's heads. Maintain your mane with today’s Groupon: for $99, you get 12 laser hair-restoration sessions at New Look Institute (a $1,080 value).

New Look Institute restores and replaces hair with an array of comfortable and subtle procedures for men and women. The low-level laser treatment increases the scalp’s blood supply, which enables follicles to receive larger amounts of mane-nourishing nutrients. The safe and gentle low-level lasers, known as soft or cold lasers, lack the heat-producing capacities to damage the scalp or hair. Over the course of 12 20-minute sessions, the accumulating stimulation of follicular foliage will replenish head forests with healthy, dense trunks and mossy bark skins. Low-level laser hair therapy also helps to repair the damage of chemical hair treatments and to acclimate newly transplanted hair to novel environs and unfamiliar cultural situations, such as museum food fights. New Look Institute recommends at least one regular treatment per week to achieve the highest degree of efficacy.