Earth's 'Wobbles' Spurring Cycles of Evolution and Extinction?
From the National Geographic: Small changes in Earth's orbit and tilt may have regulated the cyclical rise and fall of many prehistoric mammal species, new research suggests.
Earth's orbital patterns are believed to drive long-term climate change.
Over millions of years these climatic shifts may have regularly spawned events that give rise to new mammal species.
John Latter / Jorolat