Astronomical Grand Cycles

The Earth undergoes climate fluctuations in a newly discovered 2.4-million-year cycle.

Geological sedimentary evidence in the deep sea has proved the existence of the cycle, which is linked with Mars’ orbit.

A new study has found evidence of erosion in the deep sea linking this 2.4-million-year cycle called “astronomical grand cycles” with the orbits of Earth and Mars, and global warming or cooling.

These “grand cycles” that last millions and even tens of millions of years are similarly linked to changes in incoming solar radiation and paleoclimate.

To discover evidence of the grand cycles, the team examined seafloor erosion resulting from the increased strength of deep ocean currents driven by orbital forces.