一种驱动宇宙膨胀的神秘力量可能在数十亿年前经历了戏剧性的逆转。科学家们在探索一个被忽视的替代引力理论分支时发现,暗能量A mysterious force driving the expansion of the Universe may have undergone a dramatic reversal billions of years ago. Scientists exploring an overlooked branch of an alternative gravity theory discovered that dark energ