Aquarius (Jan 20 — February 18)
Ruled by Uranus, planet of innovation and change, Aquarius' often have a great deal of internal chaos going on. "An intellectual air sign, they focus their minds on their vision for the future and what they believe is intrinsically 'right,'" Thomas explains. "With so much activity going on inside of them, they focus less on the pleasure of sleep and see it more for its purpose." This practicality means that if they could lose sleep altogether and keep running, they probably would.