14 ONE ICE AGE Earth scientists believe there were many ice ages&#151;perhaps more than 30&#151;in regular succession during the late Cenozoic based on oxygen isotope fluctuations in deep-sea cores.
(14 ONE ICE AGE Earth scientists; believe; there were many ice ages&#151;perhaps more than 30&#151;in regular succession during the late Cenozoic)
14 ONE ICE AGE Earth scientists
believe
there were many ice ages&#151;perhaps more than 30&#151;in regular succession during the late Cenozoic