The Sciences is the fourth studio album by American stoner/doom metal band Sleep. The album was released with little warning on April 20, 2018, through Third Man Records. It was the band's first full-length album since Dopesmoker (2003), on which the song "Sonic Titan" appeared as a live bonus track.

Sleep is an American stoner/doom metal band from San Jose, California. Guitarist Matt Pike and bassist and vocalist Al Cisneros have been the only constant members throughout the band's history. Critic Eduardo Rivadavia describes them as "perhaps the ultimate stoner rock band" and notes they exerted a strong influence on metal in the 1990s.