El Niño is back – better get used to it

As a new El Niño event takes hold, Cosmos explains the mechanics of this extreme weather event and why scientists believe it is set to become more common. By Belinda Smith.

Australia is familiar with drought, but a Nature paper has predicted that over the next 100 years El-Niño-driven droughts will intensify, leaving Australia and PNG without rain for years while deluging Polynesian nations. Credit: Alexander Nicholson/ Getty Images