What is La Nina and how is it being monitored? Find out the effects and the reach that this system is influencing. How did Indian Summer get its name and what is the science behind the phenomenon? Winter is the season that has the biggest effect on the planet, animal behaviour and often brings out the worst that nature can bring. Nature’s Halo is a magical sight with a scientific explanation. The story of and lessons from Hurricane Katrina give us a great understanding of the ferocity and speed that nature can unleash.