Rethinking Snowball Earth: Evidence Points to Cycling Ice Ages

A new scientific model challenges the long-standing Snowball Earth hypothesis by proposing that the Sturtian glacial period involved repeated cycles of freezing and thawing rather than one continuous 56-million-year freeze. This finding better reconciles geological observations with predictions of carbon and oxygen cycling, resolving key inconsistencies in the traditional model. The discovery demonstrates that even Earth's most extreme climate conditions operated through dynamic cycles rather than static frozen states.