Scientists previously proposed 26 million year cycles of mass extinctions, but this appears to correct the period. They suggest ‘cycles of activity in the Earth’s interior’ could be behind their new period, but then say: ‘However, similar cycles in the Earth’s orbit in space might also be pacing these events.’ Their study also says ‘a […]
The 27.5-million-year cycle of geological activity
Glyn Hnutu-healh: History, Alchemy, and Me 