A new study led by Cardiff University has shed more light on how the tilting and wobbling of the Earth as it orbits around the Sun has influenced the melting of ice sheets in the Northern Hemisphere over the past two million years. This phenomenon drives the succession of global ice age cycles.  Scientists have long known that the waxing and waning of the massive ice sheets from the Northern Hemisphere results from changes in the geometry of Earth’s orbit around the Sun.  According to the experts,...