Dark energy, this still mysterious force that accelerates the expansion of the Universe, may have reversed in the distant past. This bold hypothesis, proposed in a new study, could explain ...

CoD consists of different phases (initial acceleration, deceleration, and re-acceleration) where the deceleration phase impose greater loading demands and precede many lower extremity injuries (i.e., ...

Friedman described 3 stages in the active phase: acceleration, maximal slope, and deceleration. No deceleration stage was noted in the contemporary curve.