Snowball Earth may hide a far stranger climate cycle than anyone expected
Summary
The article reports a new PNAS study proposing that Sturtian glaciation cycles were driven by repeated global glaciation and deglaciation linked to weathering cycles and large igneous province activity, rather than a single Snowball or Slushball state. It suggests a coupled box-model approach can reconcile geological and biological records over a 56-million-year span and highlights implications for understanding exoplanet climates.